I picked up one of those ubiquitous black SanDisk USB Cruzer flash drives at Radio Shack a couple months ago and used it for the first time today, plugging into a Windows 2003 Server machine. I used someone else's Cruzer flash drive before with XP and hated the software it automatically installed, but I thought I'd deal with it. Weirdness quickly ensued, with my CDROM drive displaying as a SanDisk drive and its light staying on. Time to return to my happy place and eject this bugger. Then a hard reboot.
Yeeeech! The CDROM light stayed lit forever on reboot and the system froze on the Windows 2003 Server startup graphic. Twice. I then went into the BIOS setup and reset the system IDE drives to the machine's default configuration. Thankfully that did the trick and the machine rebooted sweetly. I guess I shouldn't be too hard on SanDisk. Reading the USB Cruzer drive spec page, it doesn't say it supports Windows 2003 Server, but then again there shouldn't BE a compatability issue with a stupid USB flash drive. Too much "added value," in this case that user assistance software bundled with the SanDisk flash drives, can be a bad thing.