I wanted to respond to your message, even though it's been a while. I agree that we have far too few people working on nl:. Here are some ideas:
Leave a message for Gebruiker:Guaka, he's the official "admin" for this site, but he's been traveling quite a bit.
I don't know if there's a "welcome" message for this site (see en:Template:Welcome for an example). Often adding a "welcome" to new users' pages (or even to anonymous users' pages!) will get them to contribute more.
Keep up the good work! People like working on an active project, so if you keep working, others will join in too.
I'll see what I can do to help out. --Evan 19 jul 2006 15:53 (EDT)