I just put up the first steps of a Wikki for the Amsterdam Open Source Multimedia Tools workshop last weekend. Drop by and have a look if you are interested. And by all means, if you are a PD user in the Netherlands, please get in touch, as we would like to continue this in a series of informal meetings.
http://pd.iem.at/pdwiki/index.php?PD%2BOpenSourceworkshop
best, derek