We just released over 5 hours of training for Nuendo 6 over at fxphd.com. We take an in-depth look at the new features of Nuendo 6, but we also keep it approachable for newer users who may not have used the software before.
You can find a free sample and more information about it here: http://www.fxphd.com/store/nuendo-6-fundamentals/
Cheers,
Ryan Pribyl
fxphd