At least the small bones in your wrist weren't affected - I had a similar injury 10 years ago, but I had several bones in my wrist crushed as well and required pins and a screw. The screw is still there. My best advice to you is to do as much strength training in your forearms as possible - a wrist injury in golf can be overcome by forearm strength training, as the forearms play a big role in torque absorption during and after contact.
Before my injury, I was flirting with a handicap in the +1-+2 range - after the injury I was out for approximately four months. After they took the pins out and I went from a hard cast to a soft brace, I could barely move my wrist without extreme pain, let alone swing a club. I actually tried to take up playing left-handed (that was a joke - I couldn't hit the ball over 50 yards). After I graduated from college, I didn't play much until 2006 when I got my master's degree and finally had some time to rededicate myself to the game (and the fact that a week prior to graduation, I went out and could not break 90 on an easy course). I started practicing again and more importantly, doing strength training with a Weider hand grip, and now I'm back in the low single-digit range, hoping to cross over into the plus again at the end of this year and try to win some tournaments and take a shot at the state amateur.
Sorry for the long-winded response, but my best advice to you is once you feel up to it, immediately begin strength training on that wrist - starting off with silly putty or a tennis ball, and working your way up to a hand grip. It's a pretty tough injury to overcome, but if you train the right way, it can be done.