I have very thin fingers as well, and I love my Mighty Mouse. :-D
When I switched from Razer to Mighty Mouse, it felt unusual because it was rather small.
However, I started to love it. The trackball is very nice. :-)
I don't like the wireless mighty mouse though, because it has a rather bad response time!
I know that many people, including you, don't like it. As far as I remember, rogue doesn't like the MM either!
The Aluminium Apple Keyboard is by far the best Keyboard on the market, if you ask me. For both Mac & Windows. :-)
Do you remember my old comparison picture?
Scary! Almost like Porsche vs. Volkswagen Polo! :-D
I'm very sorry for the dirt inside of the Logitech Internet Navigator, it's quite old, huge and... ugly :-(
The Alu Keyboard is the best choice for long work and there's almost no effort to type the keys, because they are so thin!