The convenience of shopping at Amazon just got bumped up a few notches in the Northern Virginia sector of Washington DC. Folks who swear their delivery person never rings the bell before dropping off packages will be pleased to know that Amazon Lockers have popped up at multiple 7-Elevens around the region. As Zatz Not Funny notes, Amazon has yet to officially list the market under the service, but at least four locations are searchable -- and the site did find one more that's currently off the radar. If you're eager to get a glimpse of the P.O. Box-esque units for yourself or get access on your account, you'll find more info at the source links below.