Here you go a great mullet pattern that I have been using lately. A great dead drifted fly, lots of action. I use it real close to nooks and cranies in the rocks, where mullet generally hangout.

http://www.stripermoon.com/flyarch/soft6.html

Now I see that it has already been linked to. Well here it is again. I like a little bit of yellow bucktail added in under the black saddle.