While QR codes have reached a mainstream Japanese audience, in the U.S. QR code usage is limited to alpha geeks—and not all of them are sold on the idea. At SXSW, blogger Robert Scoble wore a t-shirt with a QR code that pointed to his Twitter feed, and talent agent George Ruiz encoded his contact info into a QR code. But some geeks are skeptical of the awkward technology. Many think QR codes are gimmicky, clumsy, not used well or enough, or that they're "a solution looking for a problem.