I’m on record as a microformat fan — they’re an awesome low impact largely social hack — appropriate technology for a world without APIs. That said I’ve been hesitant to add them to Flickr for the reason that APIs are better: better for us, better for you and I would hate to confuse people about this. That said Operator is the compelling counter argument, and why I’ve been sprinkling microformats and RDFa around the site lately.