I was sure I'd seen the Geek Spots one on HN before, so here, I found it: http://nerdydaytrips.com/ http://nerdydaytrips.com/ Also though in tracking that down

I was sure I'd seen the Geek Spots one on HN before, so here, I found it: http://nerdydaytrips.com/ http://nerdydaytrips.com/ Also though in tracking that down, I found this enormous (2300+!) catalog of Google Maps mashups: http://www.programmableweb.com/api/google-maps/mashups http://www.programmableweb.com/api/google-maps/mashups