In reply to KristopherHall:
http://tinyurl.com/c35zf8x
http://tinyurl.com/cpkthmw
The most common pulley injuries are A2, or sometimes A4. Ring fingers are most common, followed by middle finger. If you didn't hear a loud pop or crack then I'd guess that you've tweaked rather than ruptured it.
Whenever I've hurt an A2 pulley I can feel a tenderness on the underside (palmar side) if I palpate the finger between the MCP and PIP joints. It is usually not too painful to stress open-handed (as you would a mono) but painful when stressed in a crimping position (do this gently!)
Either way, ibuprofen and ice are probably a good idea, as is resting it initially. Get a proper diagnosis if you're worried and do a bit of reading. There's loads of info on climbing finger injuries, and some good resources over on the other channel (UKBouldering.com).
Things I've tried in the past are alternate cold and warm water, and massage to break down any scar tissue. I also tried to keep it active with easy climbing to keep the boredom at bay. Whether these really help or not I've no idea, but at least you feel like you're doing something.