Apple’s Response to Lodsys:
Because Apple is licensed under Lodsys’ patents to offer such technology to its App Makers, the App Makers are entitled to use this technology free from any infringement claims by Lodsys.
In other words: you done gone and poked the mama bear and she intends to protect her cubs.
Alternatively: you want a legal fight? We’ll give you a legal fight and I bet we win.
UPDATE: Macworld has the full text of the Apple response.