Gobles - I thing Susan is giving you some great advice. To just take it easy for awhile and consider a tandum (if anything) until your head is healed.

I am, however, appreciating your passion for bicycling. A golfing friend of mine is a commuter biker and within the last 5 weeks, had a serious bike accident when she went head over heals (with bike still attached) after a car pulled out in front of her. She was VERY VERY lucky to have escaped paralysis after fracturing 3 cervical spine vertebrae. The good news is that the vertebrae didn't move and she had an operation to fuse her spine with cadaver bone and some temporary screws and a plate put in to ensure stability until the cadaver bone fuses with her own. I saw her less than one week after the accident and her words to me were "I can't wait to get back on my bike!" Her family is encouraging her to give up biking all together, but there is no way she will give into their wishes because she is so passionate about biking. She loves it even more than golf! Can you imagine?

I wish you a speedy recovery!