I wrote awhile back about some of the specs on this system. Well, now it seems the forthcoming IBM tablet (potentially named the X50) has been seen in the wild.
I've resisted the urge to get the Toshiba M200 so far, but I may have to come up with a reason to replace my Acer when this comes out. I wonder what the battery life is going to be - I heard it's pretty good on the X40.
Since this post was originally posted, IBM (or rather, Lenovo) has released their X41 tablet. I haven't yet used one - but there are plenty of folks who have. See, e.g., Greg Hughes' great review.