EDIT: Uh, I didn't notice "set me here" button (and, strangely, it doesn't seem to work for me, even though I've enabled all scripts - clicking doesn't do anyth

EDIT: Uh, I didn't notice "set me here" button (and, strangely, it doesn't seem to work for me, even though I've enabled all scripts - clicking doesn't do anything) when I wrote the original comment. If the site has a function for users to add themselves, then Rails/Django is indeed necessary. Sorry, I've should've looked more carefully. Old comment below: Rails? Django? The data may be frequently updated but is still static - you really don't want to fire any heavy machinery on every request. This begs for a static HTML page (with a some amount of JS that shows Google Maps and filters the list). And a daemon or crontab entry (depending whenever it's based on streaming or polling model) that updates it, and, possibly, busts the caches.