Finally got it jailbroken. Restoring backup, next step is the interminable sync which will reupload my appstore stuff, music, video, etc. Then to go find all my jailbroken apps again. Fun! *
The procedure I used was kind of convoluted due to the fact that I had already installed the stock 3.0, and though I could use the mac tool on my hackintosh to prepare the file, I just noticed it doesn't recognize devices hotplugged on the usb ports, so I couldn't install it from there. I had to move the file over to a pc and use what I found in the comments on the dev-team's blog:
Props go out to EriCKY for this 16xx fix:
1. download QuickPwn RC3
2. download iphone 2.0.2 ipsw
3. Run quickpwn rc3 and do everything it says untul your iphone has a white screen.
4. unplug your iphone, turn off quickpwn and turn on itunes.
5. shift click restore in itunes and pick the 3.0 jailbroken firmware
* this definition of "Fun" means having to go through a bunch of crap just to be able to do whatever I like with something I own.