"I did this because I hate uppercase characters in the middle of identifiers and I'm too lazy to type shift to get the '_'. In addition, I find it more readable."
Haha! I'm on Dvorak too and didn't understand at all why JohnnyCache thought hitting "-" was so much harder than Space! I guess I've been completely converted for too long.
hitting - is not significantly easier than hitting _ when compared to hitting the spacebar.
http://en.wikipedia.org/wiki/Fitts_law