One of the best arguments I've seen on this matter is by Steve Yegge. It's a must read: http://steve-yegge.blogspot.com/2008/09/programmings-dirties...

I spent 10 years in industry before I decided to learn to touch type. I noticed how fast some of my colleagues could chat and code and I was embarrassed. Then I read Steve's article. It was tough at first but I can't tell you how much it's helped my productivity.

Also, remap CapsLock to Ctrl on your keyboard. It makes coding a dream. And if you use Vim or a Vim-mode in your IDE, remap the sequence 'jk' to Esc. I never leave the home row anymore. See http://learnvimscriptthehardway.stevelosh.com/chapters/10.ht...