needed a new mouse for my new laptop (its a small thin laptop so only one USB port, thus was looking for a wireless mouse (one less thing to plug in)).
apple sells a wireless mouse that they call "mighty mouse". it felt ok in my hand initially, so i bought it:http://www.apple.com/mightymouse/
for anyone with small hands and problems with their hands (tendonitis, etc), this mouse seems to be a good option, in its size, shape, and flatness.
most computer mice are too big for my hands and really flare them, but so far, really like this one. not bothering my hands at all the way most mice do.