This is a cool idea, and one that I would definitely pay for in certain circumstances (basically any situation where I end up having to drive to the UPS facility). However, I'd want to be sure that I can actually use the service under those circumstances.

My difficulty is when a company like Apple sends a package as "signature required." First, will I be able to specify the Luna address, or will I be required to have the billing and shipping addresses match up? Second, will the Luna representative's signature be counted as an authorized signature for UPS's purposes?

Both of these things are mostly out of Luna's control, unless they enter negotiations with these companies. And while this should be a no-brainer for UPS from an efficiency standpoint, you really can't underestimate their ability to make bad decisions.