Barbara Lee and Maxine Waters know the US is at least encouraging the coup. I haven't found any direct evidence of financial support for the current Gonaives group, but some of old cast of characters from the last coup are involved.

From Rep. Maxine Waters Charges U.S. Is Encouraging A Coup in Haiti (transcript)
on democracy now:

AMY GOODMAN: What evidence do you have that the U.S. Government is supporting the anti-Aristide forces?

MAXINE WATERS: Well, I guess a few days ago there was an article that appeared in "The New York Times" with a so-called anonymous -- someone in the State Department having, you know, sent a trial balloon up saying that something was going to have to be done in Haiti, and it was possible that the State Department could support the ouster. Well, not only did you see that kind of a statement coming out of the State Department, I noticed that each of the releases that they had done over the past several weeks kept suggesting that everything that was going on, all of the problems were the fault of the president, and they were literally giving out misinformation. Well, Mr. Noriega, of course, was the chief of staff to Senator Jesse Helms, who was basically a Haiti -- well, hated Haiti, and they have always worked against Haiti, and Mr. Noriega, is now in charge of that policy. And I think it's because of him -- I really believe it's because of him that these statements keep coming out of the State Department, and I think that Colin Powell was focused on Afghanistan and Iraq, and I have been communicating with him recently, and I have asked him to pay more attention.

and also:

AMY GOODMAN: We know the history of the United States in the previous coup in Haiti. Aristide forced out for three years, 1991 to 1994. It turned out that the leader of the paramilitary death squad, the F.R.A.P.P, Emmanuel Constance was on the payroll of the Defense Intelligence Agency, and as President Clinton was saying we have to go off the murderers and the rapists and thugs in Haiti, justifying why the U.S. was moving in. It turned out on his own government's payroll was the leader that he was talking about. And now he walks free in the United States, most likely here in New York in Queens.

MAXINE WATERS: Yes, that is true. He is on the streets of New York. And that sad history is a history that we in America have within ashamed of. Not only have we supported dictators in Haiti, Papa Doc and Baby Doc Duvalier. The C.I.A. has always had a hand. And we've had people like Constance on the payroll.

From Media vs. Reality in Haiti on zMag:

Another Congresswoman, Barbara Lee, directly challenged Colin Powell in a formal letter to him February 12th, after Powell had announced that the US administration is “not interested in regime change” in Haiti. Said Lee: “It appears that the US is aiding and abetting the attempt to violently topple the Aristide government. With all due respect, this looks like “regime change”…Our actions – or inaction – may be making things worse.” [6]

Finally from US Double Game in Haiti on zMag (this article unfortunately lacks any sigfnicant foot notes, which is a shame for it's content):

Most recently, as the "rebels" blocked the road from the Dominican Republic and re-took two villages in the north, reinforcements arrived from across the border. According to Ian James of the AP, Feb. 14, twenty armed Haitian commandos, shot their way through the Dominican border, killing two Dominican soldiers. With them were former Cap Haitien police chief and army officer, Guy Philippe, and the head of the Duvalier death squad in the 1980s, Louis Jodel Chamblain. Chamblain was also a leader of the FRAPH, a group of para-military "attaches" during the coup years. A close associate of Chamblain, Emmanueal "Toto" Constant, has admitted its CIA funding and direction. Chamblain was revealed in documents reviewed by the Center for Constitutional Rights in New York as one of those present during the planning, with a U.S. agent, of the assassination of the pro-Aristide minister of justice, Guy Malary, in 1993. The U.S. refuses to release documents it seized from FRAPH during the 1994 U.S. invasion - presumably to cover up the CIA ties to FRAPH. Philippe and Chamblain were among those from the Haitian opposition, recognized by the U.S. - the Convergence - who organized conferences in the D.R. funded and attended by U.S. operatives from the International Republican Institute (IRI).

and also:

I saw both sides of this double game when I went to Haiti at the time of Aristide's return in 1994. I saw the U.S. helicopter that landed Aristide at the palace and the U.S. soldiers who guarded the bullet-proof box from which he was allowed to speak. I interviewed U.S. officers in the Central Plateau who said they were specifically told to treat FRAPH as a loyal opposition, and not to confiscate large weapons' caches they stumbled upon. Most of the M-1s and M-14s seen in the hands of the Gonaives thugs today have been identified as coming from those Haitian army stockpiles left untouched during the U.S. occupation. A few M-16s, though, have begun to appear in Goniaves as well - identical to those given the Dominican army en masse just a few months ago by the U.S. government, in return for Dominican acquiescence in placing 900 U.S. troops alongside Dominican guards at the Dominican frontier - and for the Dominican agreement never to use the International Court to accuse and try U.S. citizens for war crimes. (Miami Herald, Dec. 6, 2002)

and with more on Noriega:

Meanwhile, the same U.S. government players who supported the Contras in Nicaragua - Otto Reich and Robert Noriega (See Kevin Pina's excellent series in the Black Commentator) - gave aid and comfort to those who back the Haiti contras, insisting that the right-wing dominated Convergence and it's elite, pro-business partner, the Group of 184, have a veto over any progress toward holding elections in Haiti. Over a year ago, Noriega and Reich were linked to the planning of a secret conference near Ottawa, at which the Francophone nations were urged by U.S. agents present to be prepared to call for direct intervention and a possible U.N. trusteeship in the wake of Aristide's departure after violence escalated in Haiti. The Canadian diplomat, Denis Paradis, who chaired the meeting was sacked when Canada's role came to light.