I admit this is not exactly a programming question. I would highly appreciate if you could suggest me better places to send it. I tried to check whether fora at meta.stackoverflow.com/questions/8401/where-can-i-ask-questions-that-arent-programming-questions can handle such a question, but I haven't found anyone matching.
I'm organizing an experiment on collaborative tagging of Web services (http://mars.ing.unimo.it/wscolab/new.php) that would require a reasonable number of participants (i.e. taggers). I'm looking for communities that could be relevant for that. I have left my announcement at several different places for programmers, people interested in SOA, Web services, software engineering, but still I would be grateful if you could suggest me any other fora for this kind of annoucement.