I came across this at the Robert E. Howard Forums. It is fantastic.
I know it must seem like I say this all the time, but how cool would a map like this be for the Hyborian Age? Flags, faction symbols, cities, monsters, ships, warriors, all that jazz. The golden lion of Aquilonia, the scarlet dragon of Nemedia, Grey apes lurking in the mountains of the Vilayet, sabretooths haunting the Pictish Wilderness, Atali and the Frost Giants in the far north, , the many distinctive cities and ruins of the Black Kingdoms, the Tigress gliding down the Black Coast. There could be little hints of the stories: Numalia would have the famous bowl, Khorshemish the Scarlet Citadel, Zamora a certain tower, and so forth.
A cartoony style would be fun, but I think taking after the Book of Kells' illuminations would be especially appropriate. Nemedian Chronicles, wot wot.