Hee-hee - this extra spate of posts is just what I needed now. I went climbing again yesterday, and the pain has almost gone away, to the point where I can just feel a slight soreness to the touch and when I breathe very deeply, but it doesn't hurt. So of course... I was going to skip the x-rays... 
I promise, I'll order some x-rays today. If nothing else, I'd like to know what happened.
CwB - I think I taught myself to splint the area - found out pretty fast that supporting my ribs with one hand if possible before coughing or laughing helped. Is that what you meant?
Thank you everybody for great ideas!
Winter riding is much less about badassery and much more about bundle-uppery. - malkin
1995 Kona Cinder Cone commuterFrankenbike/Selle Italia SLR Lady Gel Flow
2008 white Nakamura Summit Custom mtb/Terry Falcon X
2000 Schwinn Fastback Comp road bike/Specialized Jett