I'm more optimistic about the promise of the Mechanical Turk than many of my peers, but could never justify my optimism with an obvious killer app. Audio transcription? Pattern recognition across huge data sets, like with SETI? Tagging mechanism for photography databases? Nothing seemed convincing. Certainly, nothing seemed creative. But I think the Turk has the capacity to surprise, and it caught me offguard today by showing evidence that it will be used for massive collaborative art projects. The horizon may be far off, but there should be some really cool stuff on it.