I just saw this interesting post over at mozillazine.org's Firebird forums so I took a look at the webalizer data at mozdev. It looks to me like Mozilla Firebird 0.6 drove more mozdev traffic and download volume than Mozilla 1.3. My rough math says that there was about five times the hits on the peak days around the 0.6 release than around the 1.3 release and that the download volume was nearly double. Someone want to check my math? That's pretty wild.