Does anyone remember the interactive map?

Probably about four years ago, we had an interactive map where we could place a pin at our location. I found the thread in a search, but I get an internal error message and can't view it...I'm guessing because it's too old and has probably been purged. But another forum I frequent wants to do a map like that, and I can't for the life of me remember what website it was on or how you go about customizing it for use. Anyone got anything?