Obviously, 0.575% of in-app sales for a handful of high-profile apps isn't going to make Lodsys wealthy. What they really want is for Apple to buy their patent for millions of dollars to make this bad publicity go away.
Even more worrisome are the reports now that MacroSolve is extorting app developers in the same way for using forms in their applications.
In-app purchase and using forms in your application are absolutely trivial to someone skilled in the art. Unfortunately, the costs of proving this in a court are likely to be massive, especially now that Apple et. al. have essentially validated this patent by licensing it themselves. Very disappointing across the board.