Dancing in the Street
It mostly has news and merchandise, but this site also offers mini-biographies of some of Motown's biggest stars, including Martha and the Vandellas.
The site serves primarily as an introduction to the Motown Historical Museum. It does, however, offer brief biographies of Berry Gordy and other Motown figures.
A brief biography, a Q&A with Martha, and the latest Martha news are all available on this sparkling (literally) site, which also appears to be an example of vintage 1990s web design.