Re: 7 doesnt support touch
errr, yes it does. quite well actually.
we have a deployment of Dell Lattitude XT laptops with swively screens. Came loaded with vista, which was upgraded to XP almost instantly (which had some touch suuport) and was then then re-upgraded to 7 as soon as that became available.
Not sure about multi-touch, but the handwriting recognition is pretty decent, and really the most useful touch feature that I have found on a device with a built in keyboard and mouse