Agitar's Agitator: http://www.agitar.com/
A tool for automatically generating tests: http://www.agitar.com/solutions/products/software_agitation.html
Also supports JavaUnit testing.
News: Agitar was aquired by McCabe Software in June of 2008. It's not clear if this has any real impact on their products or customers.
Press Release: http://www.agitar.com/news/pr/20080630.html