Software for our meetings

Lifehacker has a nice intro to DimDim, which is the meeting software I'm planning to use:

• free-hosting for up to 20 (should work nice for our purposes)
• open-source (no lock-in, can download and self host)
• runs on Windows, Mac, and Linux (covers the bases and supports free software)

If you have any feedback abour DimDim, let me know. I'm working on some trials.