It still hurts like crazy to try typing with both hands, though I sometimes forget. Over the last few days I very slowly and painstakingly typed out a thousand words of book 4, mostly left-handed. Writing so slowly makes you pay a lot more intention to what you mean to say, and an idea better be good since you have to hold it in your head that much longer before your fingers catch up with your brain. I keep forgetting what I meant to write or not being so fond of a sentence any more after spending a whole minute trying to get it down.
Well I have a lot of work to do still but it's nice to be doing any, however slow.
/ end update :P