Looks like Apple snuck a little something extra into iTunes 9.0.2 for iPhone and iPod touch users -- 180+ app management.
Instead of just mirroring the 11 visible iPhone 3.x Home Screens (with their maximum 180 app slots), iTunes will now let you add even more apps. These additional apps are displayed on grayed-out Home Screens (because they're not visible on the iPhone -- you have to use Spotlight Search to launch them), but in iTunes are otherwise easy to organize and remove.
