Just glanced quickly, sounds very interesting. Combines over 14 projects to create an open source, cross platform web conferencing platform. Cool.
OpenSky is a voip to skype link, provided for free by Gizmo. Supports calls and chat (I think) but probably not video. Very interesting...
A pidgin plugin for Skype. If you have skype installed (and running) you can use pidgin to chat with friends. Genius. All the other pidgin plugins also work (off the record messaging, spell check, etc). Sweeeeeet.