I 'broke' my tailbone when I was about 13 or so (hey lets rollerblade down this hill as fast as possible without checking that it really is as straight as it looks from way up here on top!!) and for years and years I never rode a bike for this reason.
Recently got into riding to lose weight and have really loved it but once I'm going more than 5 miles in a day, which is pretty much all the time, I have serious trouble. To the point where hitting a medium sized bump will cause the kind of pain that freezes me up and I just have to coast until I can get to peddaling again.
Anyone else out there deal with this? Any ideas to make it better?