<p>A question was asked on a dgrin <a href="http://www.dgrin.com/showthread.php?t=95977">thread</a> about whether the <a href="http://www.smugmug.com/">SmugMug</a> API supported building a tag cloud – it doesn’t. A responder suggested it would take far too long to generate one from the API since you’d have to trawl through every photo. This is indeed true, but you don’t have to do it serially. I consider the <a…