The secret to loving Magic Mouse
If you hold it correctly:
1) The scrolling is sublime
2) The 2-finger swipes for page-back and page-fwd are comfortable, and a revelation in internet browsing - there's no issue with the mouse moving.
3) the sharp edges are a non-issue as you never touch the edges
I'm on day two and figuring this out has been a revelation. Going back and looking at the pics I can see the hand model is holding it this way, but Apple needs to make this more explicit. People have been trained to "cup" mice, especially those with ridiculous (left-handed need non apply) contoured shapes that lead to sweat and require a wrist pad.
Let me repeat: your palm should rest on your desk, and you should only need to move your palm for the largest sweeps, and that wouldn't even be necessary if Apple fixes the tracking speed issue.
The slow tracking is a problem if you have dual-monitors or a large monitor; I solved it using steer mouse because I already had a license, but there are free alternatives (Mouse Multiplier? something like that). I do think Apple needs to address this in a software update.
iMac CD/MacBook CD/MacBook C2D/MacPro8x2.8, Mac OS X (10.5.5)