I was recently pointed to a site that contains a multitude of really nice cartography--of a certain style. It reminds me a lot of Tony Dowler's work.
As far as I can tell, the artist has no connection to D&D whatsoever, which in my mind makes it even cooler.
It is called the The Interimaginational Institute for Fantastical Exploration and Cartography. A bit long-winded, I suppose, but who cares? Enjoy!