Version 0002 is online. Get it at (Mac):
Highlights of the new version include:
Default upload speed changed to 19200 baud (you may need to change this back to 9600 in the Tools | Serial port speed menu).
New build process no longer uses makefiles; now controlled by preferences.txt.
core/ replaced with targets/; can now link against Wiring libraries.
Replaced print() with printString, printInteger, printHex, printByte, etc.
Added menu for selecting serial port speed.
Bootloader shrunk to less than 1 KB; fuses updated accordingly (so you can fit bigger programs on the board).
Added serialRead(), serialAvailable(), and delayMicroseconds().