When using Parallels Mobile on the iPad many times I wish I could easily change the screen resolution of the client OS (I use Windows as the client OS, but I believe this applies to any graphical OS) -- in Windows, for example, this requires right-clicking on the background, clicking on a menu item, a tab, and then using a slider to adjust the resolution (which is pretty much impossible with zooming in a lot, or using the keyboard arrow keys). It would be lovely to be able to have a button on the app the opens a selection of useful resolutions (namely 1024x768, the native resolution).
Second that I agree, I'd love a way to quickly resize it closer to my native iPad size screen. Even to adjust the aspect ratio!