Learning resources

[Dlearner via Digitalmars-d-learn]

Hey all!

I'm learning programming through D and having a really good time 
(much better than with C++ or Python).  I'm aiming to make little 
games with it as a hobby so I've learned some OpenGL stuff.
But, I feel like I'm learning more library code rather than D 
concepts and idioms, especially where efficiency and performance 
are concerned.  (I also have a light interest in functional 
programming for when it would make sense to employ those 
principles.)

Are there any tutorials that show off the power of D with worked 
examples that explain the importance of certain features?