I've seen them, but I can't remember what they're called. Hold on, I'll check.
...
Tectonicus is your best bet for what you're looking for. I'm not sure how to set it up for Google Maps-type viewing, but I know it's possible and would be most useful.
http://www.minecraftwiki.net/wiki/Tectonicus
SW-5120-1900-6153








