"There's a third way to shop," Crisson Jno-Charles, the founder of Fetchmob tells me. Like other pickup-gig services--Zaarly, TaskRabbit, GigWalk (story)--Fetchmob is about not going to a store, nor going online to shop, but rather getting someone else to shop for you. Fetchmob lets you post quick shopping jobs that friends or acquaintances can take on.
It sounds a lot like a crowdsourced version of Kozmo, but Jno-Charles sees the service as being more intimate than that or any of the current open-call gig services. He views it as being used primarily by people in close proximity to each other: students in the same dorm, or co-workers on a floor. He thinks people will use it not to make money, but simply because it's what you do when you live with people or work closely with others.