There's no automated service, but you can have the post office hold any package for you for a week or so. These guys look like they're going after the online retailer distribution market though, similar to Amazon's upcoming "lockers" platform.
I found a way around: get to know the UPS deliveryman, have him deliver my package's to the (neighbour's) back door when I'm not home. Mostly books, so nothing I would miss if it got taken.
I would love to see this getting major traction.