[rglover]

Something I thought about earlier that would be nice: automatic geofencing based on my interests. So if I'm on vacation and I mark "burgers" as an interest, I get pinged when I'm close to a popular burger spot. May already exist but didn't take the time to look.

[cwe]

That sounds like an interesting project for an indie app developer. foursquare, highlight, and others have been working on geofencing stuff, so it's not impossible.

[jdc]

Georeminder does that: http://www.skumancer.com/georeminder

[k-mcgrady]

Sounds exactly like Oink (built by Milk). It was shut down and the team acquired by Google.

[gte910h]

That's completely doable as a app (I'm a professional 3rd party app developer).

[simonw]

Foursquare Radar does pretty much exactly that.