OSM Error Edition mapset of Uruguay by Cloudmade
Basic map of the region around Boca Chica
Computerteddy's standard OSM map of Nauru
Team OID's routable OSM map of Finland
Lambertus' awesome routable OSM map of the Bahamas
This is a collection of nice topographic maps from Afghanistan. They feature roads, rivers, settlements, POIs and contour lines. They also provide english transliteration of the names.