John Eaves: http://johneaves.wordpress.com/
Not everyone is a fan of his Trek work, but I consider him one of my greatest inspirations when I started getting serious about drawing. I would pour over the details when the Star Trek magazine ran articles on his drawings...that's was the thicker magazine that came out after or around the same time the fan club magazine shut down.
The Next Generation Movies Sketch Book, for Generations and First contact is still sitting on my shelf to this day and contains loads of work he did for those films. I learned to draw ship details mainly from that book.
So I love now that his blog affords him the opportunity to share things that might not otherwise see the light of day. Plus, he has links to many other Trek Artists like Drexler and the Okuda to name a few.