I've just found an interesting resource. There's a song on Quasimoto "The Futher Adventures of Lord Quas" album titled "Rappcats, pt. 3", some sort of tribute to all those oldschool rappers. And here's rappcats.com, blog-type resource with fantastic low-budget Rappcats video and much more proper stuff. Seems like it's made by some Quas admirer, and he's having fun, check this for example:
WHITE HOUSE SILENCE ON RAPPCATS.COM SIGNALS POSSIBLE COVER UP. Rappcats.com has asked for the president's views on whether or not Quasimoto and Madlib are the same person (via multiple emails and one postcard) but they have remained suspiciously quiet on the subject.