I don't know how this affects the American Diner Museum, but Heritage Harbor, their "host museum", has had trouble getting off the ground. The most recent developments are detailed in a story from the Aug. 2 Providence Journal (registration required) at http://www.projo.com/metro/content/projo_20030802_heritage.380d.html
Here's the opening of the article:
PROVIDENCE -- The Heritage Harbor Corporation, the nonprofit group that has been planning for years to build a museum showcasing Rhode Island's cultural heritage, has laid off its chief executive officer and seven workers.
Citing a drop in donations to the planned museum and a delay in city and state financing, the Heritage Harbor board has cut the CEO position, held by R. Mark Davis since May 2001.
Seven out of about 18 staff positions were eliminated across the organization, from development to administration.
The layoffs represent a setback for the museum that has been in the planning stages for several years, but has yet to open at the site of Narragansett Electric's former South Street generating plant.
Earlier this year, the Rhode Island Historical Society pulled its support from the project. And the Providence City Council has raised concerns about the museum's economic viability.
To be sure, this doesn't directly (as far as I know) affect the ADM's fundraising, but it could have an impact on their ability to open in the place and manner described on the website.