Decided to put the page for Thinkbot online even if it doesn't have a permanent server yet.
Get yourself set up with Exodus for Windows (it says Windows XP, but works fine with Windows 98) anyway, it's a thoroughly decent Jabber instant messaging client. Neither Fire nor Psi accept conferencing invitations, but Gabber (Linux) does, and the 0.5 release of Nitro should work for OS X. Lots of other Jabber clients are here.
Thinkbot is an easy way to find other people who are thinking about the same things as you. I call it Ridiculously Easy Thought Sharing. I hope it works.