Hi all. The up and download "stutter" is being looked at by jum (Jens-Uwe Mager), for one. It doesn't happen for everybody.
thasquintz, maybe you can help. Have you been watching the stats that graph uploads and downloads?
Disabling Ultrapeer helps too.
He has made a Pro build available for OS 10.2.6 users at
http://baghira.han.de/~jum/ if you're interested.