In another thread I mentioned my suspicion that Android omitted multi-touch and auto-rotation to avoid patent issues with Apple. An article today in Fast Company may support this idea. It's such a useful control mechanism, I believe it will eventually become as common as the mouse. Sadly, the first developers will have to be wary...
http://www.fastcompany.com/blog/chris-dannen/techwatch/does-apple-really-own-multi-touch
http://www.fastcompany.com/blog/chris-dannen/techwatch/does-apple-really-own-multi-touch