Two cool apps were released today:
Backgrounder - This is a SpringBoard addon that allows you to configure specific applications to continue to run in the background. This is actually pretty significant. Now you can download apps like Palringo and Rooms in appstore and configure them to run in the background after you hit home. Note: I am adding this to the list of reasons to jailbreak.
Vibrus - This is a SpringBoard addon that gives you some force feedback when pressing keys on your keyboards. It’s configurable for force and duration of vibration. (Doesn’t yet work on 3g).