Apple has released a new version of Bonjour for Windows, 1.0.4, just in case you're zero-configuration networking with any Windows PCs in the area. There's no changelog available, but this version dropped as a preview onto the ADC page last month, and apparently "includes Windows Vista support and various other bug fixes and enhancements."
The release is good, of course, not only for Vista, but also for Windows 2000/2003 and XP. Additionally, Apple's covering their 64-bit bases as well-- they've got a 64-bit compatible release ready too. Like it or not, we can't all be on a Mac all the time, and fortunately, Bonjour makes networking without the hassles possible on both platforms.