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

http://atariage.com/forums/forum/12-atari-8-bit-computers/

http://gtia.com/

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

http://www.wudsn.com/

http://sdx.atari8.info/

http://www.virtualdub.org/altirra.html

http://www.horus.com/~hias/atari/

http://wilsonminesco.com/