summer-announce - join
Announce only list for Summer of Code
Low activity, 260 members

Summer Discuss 2006 - join
A discussion group for those interested in taking part in Summer Of Code 2006.
Low activity, 900 members, restricted

SoC-GAIM - join
A support group for those chosen by Google's Summer of Code to work on the GAIM project.
Low activity, 11 members