It's what Path is trying to capture, but they're such a new service that they don't have the problem of displaying multiple year's worth of data (in their case photos). If people keep using the service, I'm sure they will eventually have to come up with a better way to find the most interesting moments.

Way better than path. This allows a level of interaction and intimacy (if they offer good integration with lists, which conveniently got 10x better last week) that you can't achieve on path.