multitouch?

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How complicated is it to get multitouch going on the Magic? I have the Google Ion developer version, so I'm pretty sure it's already firmware unlocked to install custom builds.

Also, does the multitouch driver enable multitouch abilities in everything, or only for programs written specifically for it? What I mean is, if I write a game in the regular SDK that has two on-screen buttons, will a multitouch user be able to hold down both of them at the same time?

I havent had a android phone since i sold the G1 a few months ago. But if i remember correctly, there is a app out that allows you use multitouch to zoom in/out. But you need to have the phone rooted.

I really don't care about zooming, I'm more interested in whether or not I can write my own app that can sense multiple touch points.