I have a MX-1000, but I'm thinking of buying this BT Mighty Mouse. I agree that MX-1000 is a pretty good mouse, and I don't have much complaint in terms of its functionalities. However, unlike others here, I hate that cradle. I bought a wireless mouse because I didn't like clutters. But this thing has TWO cords dangling on the back, and it takes up valuable desktop space. I find this actually bothers me more than the wire of a wired mouse sometimes.
I know for others those two more wires on the back and small desktop space might be nothing to complain about. But, to me, it's really annoying. And with my new MBP, it's simply not an option to carry that cardle around. Right now I use an RF receiver from another Logitech mouse I have, and use the cradle only for recharge. But even that small receiver is annoying when you have to move around, since my MBP won't fit into sleeve with that thing attached.
So, a BT mouse with standard battery is a perfect fit to me. I don't mind lifting index finger for right click much, since I'm already doing that most of the time any way, although I wish the mouse surface were pressure sensitive rather than simply touch sensitive.