Here is a link to the list of distributors who work with the Film Forum in New York City.
Mark Litwak, an entertainment lawyer who specializes in independent film, wrote an informative article titled Distribution and the Indie Filmmaker.
Check out Film Specific. Stacey Parks has created a really great community filled with excellent resources for film distribution.
Educate yourself on the film market attendees. Here is a list of the 2008 American Film Market attendees. These companies are selling product and one of them could be yours.
Another excellent resource for producers, sales reps and distributors is the Web site www.cinando.com (a division of the Marche du Film - or the Cannes Film Market). You can search its database and learn about international producers, sales reps and buyers (includes North America).