Interactive map of Game of Thrones

Quartermaester is a "speculative" but extremely complete interactive map of Westeros and Essos, the two continents across which Game of Thrones' action sprawls. Character paths and noble constituencies are among the available overlays-surprisingly useful for anyone trying to get the complex series in mental order. Note: it follows the books, not the show.

Update: I just bought this collection of poster-sized maps (HD scans are here) for $25. Far more delicious detail of the Thrones world, if not of the characters themselves.