There's a Mini DisplayPort as well. It's the smaller port to the right of the Mini DVI port. Adapters are available at the usual overinflated prices... I hope there will be more of a 3rd party aftermarket for these than for the Mini-DVI adapters.
"Connects to up to two external displays with digital resolution up to 2560 by 1600 via Mini DisplayPort to Dual-Link DVI Adapter or 1920x1200 via Mini DisplayPort, Mini-DVI to DVI Adapter, or Mini DisplayPort to DVI Adapter. Analog resolution (VGA) up to 2048 by 1536 using Mini DisplayPort to VGA Adapter or Mini-DVI to VGA Adapter."
Sweet! I got a mini back in Nov when I went freelance and I've been thinking of getting another, because they're so cheap that you can have a second just as a backup. This pushes me over the fence into actually getting one, can't wait.