If you are a Debian developer and need realtime interaction with an Ubuntu developer about the state of your packages in Ubuntu (or vice-versa), #debian-ubuntu on irc.oftc.net might be useful. I had forgotten about that channel, but it resurfaced during the discussions about improving communication between both projects.
I recently (during a UDS lightning talk) discovered EtherPad. It’s a collaborative editor (like gobby), but uses a browser instead of a standalone application. It’s free software (Google open sourced it after buying the company that was developing it), and there’s a free online instance at ietherpad.com. Setting up a new pad is as simple as going to http://ietherpad.com/foo and clicking Create Pad. It’s written in Java, and not packaged in Debian (yet).
So, this morning, I did my first video call over XMPP between two N900.
However, so far, I failed to do an XMPP video call from an N900 to something else. When I try to call pidgin on my laptop, pidgin simply crashes, but of course that’s not a serious bug if people can DOS your pidgin instance since, according to the Debian bug:
Assuming your XMPP settings require that users must authenticate with you before being able to send you messages, only your authenticated users would be able to freeze your client, assuming they knew you were actually affected by this bug.
The upstream pidgin bug hasn’t seen a lot of activity lately. :-(