In one of our favorite Valentine’s Day posts of all time, Chris Dixon posted about the “geo stack” – a model for how to think about the various layers of the geolocation ecosystem.  According to Chris, the stack looks something like this: lat long detection > lat long translation (into venues, addresses, etc.) > user [...]

A new social check-in app called PlacePop quietly joined the social checkin space over the weekend.
This is what they have to offer so far:
- The ability to check in to a place
- Aggregated reviews and tweets from Yelp and Twitter
- The ability to add a photo (oddly lacking from Foursquare and Gowalla, but present on Yelp)
- [...]