Ubuntu should work but you have to use the alternate install CD, and then it is probably the easiest way to go. You'll be using dmraid, not Windows drivers, thank goodness - yuck- the very thought! Google HOWTO RAID 1 ubuntu dual boot, and you should find the tutorial. Here it is
It can work quite well, not flaky at all: up until recently I had dual booting with XP SP3 with RAID 0+1 using Slackware 12.1, but that was considerably more work. There's a long thread about how do that here, as well as a HOWTO that was written about it (not by me).
I had nothing but grief from OpenSUSE 10.3 and 11 when I tried using them. You'd think with the infamous Novell/Microsoft deal that it'd play nicer with Windows, or that it'd be the best of the bunch, but no such luck, for me at least.