Turgenev's Dungeon Maps
There's a fellow by the name of Turgenev over on Dragonsfoot whose been putting up some very sharp dungeon maps that have an oldschool vibe to them.
In essence they are black and white overhead 2d gridpaper maps done in Photoshop. There are currently 12 maps scattered over the 3 pages of the thread. Take a look at the results at:
Wow, thanks for the plug (I just saw this). Course those 12 maps have ballooned to over 70 maps now (at this post at least).