The five listed above are my primary suppliers as well. I do some occasional eBay buys outside of them, but Rob (BigRob777), Dario (Dario), Bill (ilikewood), and Rich (low_48) are all pen turners so they know what most pen turners are looking for, and Darick (chitswood) is catching on very quickly. To be honest, I'm somewhat disappointed Darick found IAP and vice versa...I used to get some great deals from his father and him on eBay!!! [
] Oh, two other people who sell here pretty regularly and who are also wood turners are Drew (whatwoodido) and Mark (youngturner); their stuff is also usually very nice.
If you want to get an idea of the caliber of wood these guys sell versus what Rockler, Woodcraft, etc. typically sell, check out these threads:
http://www.penturners.org/forum/topic.asp?TOPIC_ID=14785
http://www.penturners.org/forum/topic.asp?TOPIC_ID=14904
http://www.penturners.org/forum/topic.asp?TOPIC_ID=14829
http://www.penturners.org/forum/topic.asp?TOPIC_ID=13425
I tried to find one thread from all of the suppliers mentioned, but some haven't posted in a while. However, keep an eye out for their posts...Rich and Bill typically only post here when they come across something truly unusual.