When I was living in Leiden, I made a public google map of the local used bicycle shops (+ Bikelane because they rock). I did it to keep the hours straight... Why are the hours so irregular?!
Unfortunately, I won't be able to keep it up-to-date remotely although I'll keep it open and public.
I had one collaborator and I'd like to offer full collaboration to anyone who is interested in updating it. It's had just over 50,000 views so far because I think it's been useful to a lot of the newcomers in Leiden.
Send me an email if you are interested or leave a comment.