Most of you likely know what Gravatar is (& have an account). It alleviates the need to upload profile photos to every website you use. But what about for locations? Long term travelers are constantly changing locations, and get sick of keeping all their various profiles up to date.
Your Travatar is your location that follows you from site to site appearing beside your name when you do things like comment or post on a blog.
There is no doubt this would be a useful service for travelers who are constantly arriving in new locations. There is no doubt developers would value and utilize such a service (assuming it had users). The big question is how you would monetize such a service?