A brief list of TODOs:

Translations required

There are still quite a lot of articles that need to be translated.

Dutch to English

Merge XOP and XOP_System (and NL/XOP with XOP_Systeem)
Add communities to Communities and NL/Communities
Update Applet and NL/Appplet with latest Java changes, and the new Flash generator and the ajax-webchat. You could have a look at the webclients section of our FAQ as a starter.
Expand BotServ and NL/BotServ articles (and perhaps merge with the Bot articles)
Perhaps add more real-world examples to MLock and NL/MLock
Check if there are pages missing from the Index page.
Add RegisterChannel and RegistreerKamer (with a fallback redirect on NL/RegisterChannel and RegistreerKanaal)
Add Register and Registreren (with fallback to NL/Register) each linking to the channel, nickname and wiki registration articles.
NickServ Group article. Have a look at the FAQ entry about max number of registrations.
Write the Wildcard and NL/Wildcard articles.
Check if there are other pages missing content, using for instance Special:Allpages, Special:Deadendpages, Special:Listredirects and Special:Lonelypages