Installed 10.6.1, but it didn't help the printer.
Checked Xerox and they've posted a new driver installer and I was able to get it to print.
Oddly enough, I couldn't get it to work via the built in USB port, but I was able to use the USB->Parallel adapter I'd been using with my work laptop. Guess the Dell will get reconfigured tomorrow to use direct USB instead of the adapter.