Before I started coming to the guild, the ENWorld Art, Cartography, and Miniatures forum was one of the places I liked to hang out and see what was new. Thanks to their search feature, you can click on this link:

http://www.enworld.org/forumdisplay....ry=Cartography

and see every cartography posting since 2005. There's quite a few maps in there. Two threads which I found particularly outstanding were Hellhound's Underdark Maps, which had locations maps he did for an Underdark campaign at

http://www.enworld.org/showthread.php?t=133677

and Phineas Crow's Maps, which had more than 100 maps of various fantasy locales he did some while back at

http://www.enworld.org/showthread.php?t=73423

(Note, in order to download and view the maps registration for the site may be required--however it's free and ENWorld has quite a bit to offer for rpgers.)