Update:

I never found a good, relatively low-labor method for keeping white bar tape clean, so I'm not really adding a lot to this thread . But I thought I'd toss this out there: A picture of me and my (now ex-)bike to show what happens if you just let white bar tape go without ever cleaning it (and if you don't suffer some horrific hand injury as shown in Zen's picture! ).



You can decide: Is it worth hours of scrubbing and care to keep that bar tape clean? Or will I just live with black handprint spots where I put my hands most often? I decided on the latter, and went with black bar tape when I got my new Seven.