I’ve spent far too much time trying to figure out what this weed (wildflower?) is. If you have any leads, please let me know!
EDIT, 6/17/12: It’s apparently a Japanese wineberry, which looks a lot like a raspberry. Well, technically, a wineberry is in fact a subspecies of raspberry, so if you call it a raspberry, you’re not really off-base.
But it’s tricky to identify without any berries!