I had stumbled across what is billed as “The World Wide Repeater Directory” today: http://www.rfinder.net/blog/
While not a free service ($9.95 per year for a subscription), their IOS and Android Apps provide an new way for hams to access repeater information on-the-go. I purchased the iPhone App to try it out ($9.95, but that includes the year-long subscription). The App knows my location from the phone GPS and can show the visual location of repeaters on a map, or simply list them (by distance, frequency, or call sign).
I think I now have a permanent replacement for the pocket repeater directory I used to by each year, then promptly misplace. Plus mapping the locations seems far more useful than simply seeing a list by region.
73, Bob, WB4SON