Yes, Debian is being translated into Dutch as well.

The Dutch (and the Belgians of course!) have copied some guidelines for coordinating translations from the French list, and it's now available as L10n/Coordination.

The Dutch use debian-l10n-dutch@lists.debian.org for their coordination.

Here are some Dutch translation resources which might be useful:

If you want to help translating, here is a way to get started (copied from cobaco's message on debian-l10n-dutch@lists.debian.org):

L10n in Dutch

nl/L10n/Dutch