Let's use a little common sense here. The touch has been out for about 2 weeks. If installer.app or another hack existed, don't you think it would be all over this board?
Then again, maybe no one thought of trying to install installer.app on their touch until now.
If no one posted without using the search feature, which isn't always very helpful, there would be virtually no new activity in this forum. Bring on the simple questions.