My faves have already been noted.
The Dark Sun cloth map.
Hârnworld's every map.
I'm partial to Mystara's sticking with hex maps eternally. Something very pleasingly nostalgic about it.
Tangent: If I may offer a point about a trend in maps for settings I think is producing awful results. There are more and more maps that are done with computers that have been adding a 3d aspect to the maps. Unfortunately, the end result has created the uncanny valley of cartography. It tries to look realistic, comes close, but ends up looking far worse than had they just drawn it out with a pen and paper. The 4e Eberron poster map has this uncanny valley cartography. The closer it begins to look like an attempt at satellite/aerial photos, the more we expect things to really look like how a satellite/aerial photo should look.
Please, please, please. Fantasy cartographers of the world, resist the urge to CGI-up your drawings to feel like a satellite (hint: satellite photos of mountain terrain may look like random lumps to you, but they aren't, and your map's mountains shouldn't look like randomized pattern of bumps) if you can't do it right.
[/soapbox]