Wow. My feeling were kind of mixed on this thing, but I didn't even think about jailbreaking. That changes my thinking a bit.
It's been a long time since I jailbroke by iPhone (since the App Store, basically). Although mine is basically just an iPod now (couldn't keep up the family plan), it's still just a first gen, anyway, so tethering isn't really an option here. But the fun of getting under the hood seems more appealing with this thing.
I just hope a bunch of developers don't abandon the iPhone/iPod Touch when they start writing for this device.