The Fusion Garage claim seems to center around there being a "lack of any formal legal relationship or contract" between the two companies, despite their openly working jointly on JooJoo's development. Much of the filing is the legalese version of JooJoo's previous response, and in parts reads like a terribly depressing (and one-sided) history of what could have been a terrific device. That is, before it became pretty much irrelevant.
It reads one sided, but isn't it fair to say that Arrington's account was one sided. I'd not be surprised if the truth is that Arrington didn't pull through on his vague promises and FG ended up doing almost all the work.
Not that it matters. I'm not spending $500 on the iPad, so why would I spend $500 on an even more limited device in the JooJoo?