I switched to dvorak with a http://typematrix.com keyboard about 10 months ago and not looking back, only drawback is that i cant type on the laptop anymore. Having the enter and backspace keys in the middle of the keyboard is truly the biggest benefit for me, hitting enter with a "strong" finger really makes a difference.

The main reason i switched to dvorak was that i wanted a typematrix keyboard and if i was relearning where the enter key etc is, i could as well switch to dvorak.

It took about three months to be as fast as qwerty.