Location Views - Clickable markers?

Re. Location Views - As far as I can see, there's nowhere that you can configure what happens if a user clicks on one of the markers displayed on the map. Has anybody implemented this, and if so can you give me a few pointers? I don't mind doing some coding, just where to start.

Also, is there anyway of controlling which marker (color etc.) gets displayed other than by using the taxonomy marker feature. That works, but I'd like different views and different content types to use different rules for marker types/colors. Any ideas?