We are playing about with the idea of a non-commercial directory (which has always seemed to be what the loose conglomeration of WordPress users lacked) - listings of WordPress blogs and their information, searchable by tag, plus RSS, xml-rpc ping and the usual web2.0 stuff.
To stick to the Open Source ethos, listing has to remain free, with no paid premium listings. We've also tried to impose some conformity in matters such as numbers of tags, multi-word tags, etc. - which, hopefully, would minimise spamming.
If you can spare the time, feel free to head over to http://www.wordspace.info and try it out - feedback is welcomed.