I'm lucky enough to cycle to work across London (6 km/4 miles in each direction) for my commute and I certainly wouldn't consider a folding bicycle or a scooter. A normal bike works well and I can have paniers on the back for carrying shopping, books, etc.<p>If you need to go geek then you can have all sorts of electronics on your bike to track progress, add a Polar heart monitor, get an app for your phone...