One of the police ranges where I get some of my brass has something similar. It sure saves on the back!
We use pecan pickers at our USPSA matches. They work pretty good and you can dip them in a puddle to wash away the mud if it is wet.
I saw one of these in an ad for a brass picker the other day. I was all excited wanna get one so I tell the wife, "Hey I found this cool thing for picking up brass!" After looking at it she gives me one of her "You simple minded Yankee" looks and says "Yeah, that's a pecan picker.." I want one, but 70 bux is the cheapest I can find one so far. Update: While in Lowe's today I stumbled across the pecan picker Like the one in Sea's post for 28 dollars.