The importance of tags - a note to event planners

Something i was just thinking about as I searched the web for information from a past event... why aren't event planners taking advantage of tags? A note to anyone planning conference and events, when you issue your PR and publish your event website I suggest you considefr using an "official" tags that you suggest people use when referencing and publishing material about your event. It sounds like a no-brainer but not many folks are doing it -- except maybe O'reilly. I recall Where 2.0 last June (or was it May) and the conference organizer maded it very clear that if you were blogging or publishing material about the event they suggest you use the tag "where2006". With all the people blogging, using flickr, indexing material on digg, technorati, and del.icio.us it would make life much easier if everyone was on the same page and using the same tags rather than making up their own. As an example, last year I moblogged loads of photos from AU in Orlando. they were tagged with many tags, including "au2005". Searching flickr using this tag yielded many hits, however, what about photos from the event that didn't have that tag? See http://flickr.com/search/?q=au2005 as a sample search. Curiously, nothing on digg is found using au2005. Imagine... "AU2006" the official tag of Autodesk University... sounds like a great idea to me!