I've been really impressed with the guys from Fly Fish Food. They have some great ideas and new variations or twists on some original fly patterns.
They also now have an online store and offer a good variety of materials. One of the best things about their fly tutorials is that they have links directly to the specific materials needed for the pattern. Their tutorial videos are very well done and easy to follow(unlike some others I've watched over the years).
If you get the chance be sure to check them out.
Fly Fish Food Website