I've decided to give in, and bought myself a bike, of the pedal kind. Last one I had was a Giant Innova when they were launched (1990ish), and it's been 15 years since I rode a bike pretty much.
Innovas are now seriously upmarket kit and expensive (they were then, I just didn't realise that £400 was a lot for a bike at that time - I was working on mags specialising in Peer Gynt hardware), so I've got a Specialized Crossroads Sport. Already started modding, with a handlebar unit which allows attachment of the GPS/iPaq/iPod units in rugged cases, and a rack, and computer, and probably twin 10W halogen rechargeable lights.
I'm unfit as anything though, two miles of hilly town had me out of breath :/
Richard