It's been awhile since we've heard anything from Pinger, creators of a service that allows you to trade voicemails like they were emails. Their previous offering was interesting but not ultimately useful for most people. Their new offering, a clever iPhone application (iTunes link) that combines a social media aggregator, a dialer, and an IM client is interesting and likely useful for most people. For me, it addresses my #1 gripe about the iPhone. It's also free.
Read on for a review!