Rob Bushway has been looking hard at Vista lately and has asked some really good questions about the inclusion _or lack of _ink support in the new OS. Rob sees this as a huge missed opportunity and I suspect there are few long term tablet users that would disagree
In his latest post Rob points out
Another Vista Ink integration issue - Windows Sidebar Gadgets While I don't excuse it I can shed some light on why the gadgets in the current implementation of the sidebar lack
real ink support. It comes down to what gadgets really are... HTML and JavaScript. This means that the ink in gadgets problem is really that age old (in tablet terms anyway) problem of ink or the web. Except that it is actually worse, you car only use client side scripting and controls...
I know this because I had exactly the same thoughts as Rob and looked into it a while back. I've put it in He "too had" basket for now, but if anyone warts to take a crack at this they can find a guide to writing gadgets here:
Windows Vista Beta 2 - Sidebar Gadget Development Overview