+1. The funny thing is, I think that a speedometer is the least useful feature on a bike computer. Mileage is helpful for maintenance, and a clock helps keep me from being late. For fitness, I think a heart rate monitor and cadence sensor are best to have, (and for race training, a power meter) but you can't get both of those without springing for a manufacturer's top-of-the-line computer.

If I could make one to my specs, it'd have a clock and HRM front and center with cadence off to the side and mileage as a secondary function. If I really wanted to know how fast I was going, I should be riding with a bunch of other speed geeks. "Faster than x mph" doesn't mean anything unless it's also "faster than that guy".