The concept of a Twitter-aware cuckoo clock has certainly been done -- just not by Twitter itself, until now. Twitter UK has teamed up with Berg to produce #Flock, a smarter-than-average clock that both marks time and pops out a bird whenever there are new followers, replies and retweets. It's comparatively simple underneath the wood, as a Berg Cloud developer kit links an arm mechanism to the owner's Twitter account. The trick will be owning one in the first place. As much as we'd like Twitter to sell #Flock on a general basis, the company is giving away its hand-built creation only to companies and people that "push the creative boundaries," which will mostly involve advertisers rather than any of us common folk.