Folks who have nice reptile web store fronts I haven't seen listed:

http://www.joecompelreptiles.com/
http://www.bloodpythons.com/index.htm
http://www.spectacularcarpetpythons.com/
http://www.stevegooch.com/
http://www.riobravoreptiles.com/ (gotta sign up to receive email notification of available, but OH SO WORTH it...)
http://www.leopardgecko.com/BluefieldsBoas.html
http://www.millerreptiles.com/index.html
http://www.basicallyboas.com/index.html
http://salmonboa.com/index.html
http://www.moreptiles.com/
http://www.vmsherp.com/index.html