I've been waiting for this. Rob Bushway has finished his comparison trials of the Toshiba M200 and Lenovo X41 Thinkpad Tablet PCs. He goes into some real depth about his likes, dislikes, preferences, and how these two Tablet PCs fit or don't fit into his workflow. This Man of Many Tablets also gives some thought and insight to the other Tablet PCs he's had his hands on in this comparison as well. Very thorough. Great job. Well worth a read.
His decision? You'll have to check it out here.
UPDATE: Rob has officially adopted the acronym MMT (Man of Many Tablets.) Instead of Rob Bushway, Esquire we have Rob Bushway, MMT. Look for it on a business card soon! ;->