Mobile Burgering

Seems Japan's leading the way by having customers pay for their food via mobile.

Mobile Doorbell

I thought this was worth posting here despite the unit being over for everyone else.

I found it on Lifehacker which is a site you should all check out anyway.

Apparently soon you'll be able to answer your doorbell with your mobile from anywhere in the world.

Why not just leave that person with the spare key? I mean otherwise, I don't see how it's a big enough of a deal to warrant the invention...