In reply to ianstevens:
I've got a bit of a pull on my left bicep. Nothing hugely horrible, but just painful enough to know it's there. I found climbing at the wall yesterday evening to be a pretty serene experience, I was spending a lot more time concentrating on footwork and trying not to load my arm. I couldn't climb *quite* to my grade, but I was close, and it felt like a route to huge technical improvements for me.
I'm not sure how I'll maintain the non-thuggery when my arm is better, but I'll try.
I'd be tempted to climb routes one-armed if I were you. You'll take a bunch of falls, but I bet your balance and footwork technique improve.