Microsoft XBox 360 HD DVD drive and Panther/Tiger with USB 1?

Have you read the info contained on this page, concerning an ethernet-based connection between the XBox and a Mac?

According to a report posted here, someone connected an XBox 360's HD-DVD drive to a Mac's USB port and it was recognized. If you're intending to connect it to a Mac with PCI slots and running OS 10.2.8 or newer, you can and should install a USB 2.0 card. A card having an NEC controller chip will be more Mac-compatible than others. If you plan to connect it to a Mac without USB 2.0 upgrade capability, using the onboard USB 1.1 bus will be limiting. I've got an external Pioneer DVD±RW USB drive, but I've never tried connecting it to my B&W G3's onboard USB 1.1 port to read DVD data disks (I connect it to the USB 2.0 PCI card). Try it and see what happens - you can't damage anything. In addition to the Mac's CPU speed and graphics capabilities, playing a DVD game would require a faster bus than USB 1.1. Hopefully, you can install a USB 2.0 PCI card and enjoy optimal performance.

As a followup, I just tried an external Sony DVD±RW drive, connected to an onboard USB 1.1 port on my B&W G3-450. There were no problems navigating through the contents of a data (about 2.5 GBs) DVD, and playing MP3s directly from the disk was glitch-free. Attempting to play a DVD movie was a different story, with (as I expected) choppy video and stuttering audio. This quirk was eliminated, once I switched to a USB 2.0 port.