Having broken both wrists in separate accidents 2 years apart (ORIF distal radius fractures with plates installed) I know where you are coming from with this (also cycling accidents).
If your injury/treatment was like mine then in all honesty its not something worth worrying about, you'll be able to pick up typing with a single hand fast enough and after a couple of weeks you'll be able to use fingers to hit things like shift key (as a developer you'll still be able to type faster than 90% of the company!).
Over time you'll find you'll be able to do more and more typing with the injured hand, and by getting blood flowing through it via usage it'll probably help the healing process.
If you want to ask any questions feel free to contact me via twitter/email/etc.
