To switch between apps, you can hold the Home button down (Don't know what that is mapped to in r2d2b2g, and it will 'zoom out' to a WebOS-like list of cards that you can swipe left or right.
Swipe up to Quit the app. Press home, or one of the cards, to return.
A few things thought:
- I didn't find how to switch between apps.
- Setting a custom resolution will be a good feature.
- Copy/Paste from desktop to B2G
edit: Ok so to go back to home screen, on a mac use fn+left arrow key of fn+right arrow ke