You don't hire lawyers. You pay Lodsys for their valid patent and if Apple prevails, you get your money back + $1000. Why fight something if Apple is going to fight it for you? I'd be protecting my butt from fines first and worrying about the outcome later.
I do find it strange that Lodsys has only filed claims against 7 developers. I mean what is that? Target only those developers you think you can a lot of money/sales out of? Certainly there must be more than 7 people using the demo/upgrade system? It seems to me if they sue one on those grounds, they should have to sue them all or there's some kind of discrimination going on. Why should one developer get off scott free while another is sued? The whole thing reeks of easy money, but like I've said before, I'm 100% against ALL "software patents". I think they should fall only under copyright law. Patents should be reserved for physical inventions, not abstract ideas and GUI layouts.
Test cases? Maybe these are the ones that they feel can influence the rest of the developers.