I would be very pleased if you would consider including some more libraries in the official release.
For me it would save a lot of efforts if some of these Hardware Abstraction Libraries (http://www.arduino.cc/playground/Code/HardwareAbstraction) could be included. Especially the LED, Button and Keypad libraries.
Also the Timed Action (http://www.arduino.cc/playground/Code/TimedAction) Library, for all those 'I want multiple loops' requests. As well as the Finite State Machine (http://www.arduino.cc/playground/Code/FiniteStateMachine) Library.
Well now... Sorry for this selfpromotionishthingy.