Mitchel Sellers
Mitchel Sellers is one of the best resources in the DNN Community with his superb tutorials and highly active participation in the DNN Forums.

Michael Washington (DNN Tutorials)
Getting started with module development? Michael Washington's tutorials are what got me started. His tutorials are well done and treat a wide range of topics. Check him out!

Looking to purchase some modules for you DNN portal? Look no further than SnowCovered.com! By far the most complete listing of DNN related resources (skins & modules) around.