There are just 10 sets of extra maps and posters left for Carcosa, so if you want it, better act quick. These extras are LotFP Store exclusives.
Special thanks to Noble Knight and Troll & Toad for helping me out, they both allowed me to basically tell them what would be good orders for me to ship (the advantages of having an excellent sales history, eh?) and both those stores have limited numbers of Carcosa and Isle in stock right now ahead of the more general US retail availability coming this spring.
If you're on the fence about either book or just want to keep up with the scuttlebutt, I've been updating the reviews pages quite often, so click those links on the upper left and see what people have to say about both books.
Here's an interesting Men and Monsters Matchup table for Carcosa.