I'm with you on that, but the concept is a good one albeit not widely adopted. I've only created on bag, but I still peek in there now and again to see what other people are putting together. It's niche, but still a good, simple starting point if Twitter wants to get into eCommerce. That being said, Luke is a talent no matter where he goes and hopefully he'll bring about some good UX to the poorly-designed Twitter front end.