The guys at cyclelifestyle have launched a campaign to get a "Single 'London Cycle Map' that's clear and easy to use and corresponds to a unified network of signed cycle routes throughout Greater London: the cycling equivalent of the London Underground Map."
I really like this idea as I spent a lot of time working out my route, and I will need to do it all again whenever I go somewhere else. Also this will be a especially useful for tourists and anybody who cycles occupationally such as Boris Bike users.
You can help by signing the petition on there site:
There's also a facebook group to join too.
In the mean time if you are looking for an online cycle map for London check out: