Boot Camp works brilliantly, even got some games running (HL2 at about 20fps). You need a full install disk (not upgrade) of XP with SP2 but if you only have the upgrade disk you can connect an external CD drive when it asks for the older version of Windows.
Here are some pics I made using iWeb and .mac:
http://web.mac.com/jonowallace/iWeb/Site/MacBook.html
That page was ridiculously easy to make. This rocks.