GadgetFreak The only exchange conduit that I know is the Novell/Ximian offering. After I posted I must admit I thought "Exchange!", and it looks like I was right.
ScottC I agree that Linux is not suitable for you average end user, but GadgetFreak seems to be a more than tech savvy and happy with it, having moved over and only keeping Windoze for one app.
Personally, I use Apple Macs at home and keep an old dual boot W98 and SUSE Linux box for fun and the occaisional prog that must run on M$