Any DVD writer will work with your Mac. You don't need any special drivers to get your Mac to recognize a DVD writer (or a CD-RW, CD-ROM, DVD-ROM, or combo driver for that matter).
The issue is iApps support (iTunes, Finder disc burning, iDVD). The only "officially-supported" 8x DVD burner for OS X 10.3.3 is the Pioneer DVR-107D. This means that once connected to your Mac, you don't need to install any additional driver to get iTunes, iDVD and the Finder to recognize the drive and use it to burn CDs and/or DVDs. Critical if you use those apps to burn your CDs & DVDs.
But if you're using Toast Titanium 5.x/6.x or any other third-party disc-burning app (DragonBurn, etc.) for your CD and DVD-burning needs, then "official" support it not an issue since Toast Titanium, etc. will recognize and burn to most 8x DVD burners out there, irregardless of whether OS X 10.2.x/10.3.x "officially" supports the drive.
I'm currently using a NEC ND-2500A with my dual-1.25GHz MDD G4. It's a great choice because of: 1.) excellent burning quality; 2.) relatively cheap; 3.)you can give it iApps support by installing a special driver by LaCie. It's been great so far. I use Toast Titanium 6.0.5 for burning, and MacTheRipper + DVD2OneX for backing up my collection of DVD movies.
Email me at henjie@NOSPAMinfo.com.ph if you have any additional questions , remove NOSPAM from the addy.