Links to other Atari 8-bit resources you may find of interest:

AtariAge Atari 8-bit Computers Forum

http://gtia.com/

http://jttheninja.com/collections/computing/a8.html

Peter Dell (Jac!: WUDSN IDE for Eclipse)

SpartaDOS X Upgrade Project

Avery Lee (Phaeron: Altirra Atari 8-bit Emulator)

Hiassoft (TurboFreezer, High Speed SIO driver)

The Montezuma (SIO2BT, RespeQt)

http://wilsonminesco.com/