If you're getting bored of the multiplayer maps included with the game you should head over the website Abacvs. They are hosting a lot of user created maps which brings you hours of online and skirmish joy! If you feel like creating a map of your own visit our partner site Mod-Project (Spanish website, but look under "descargas" for a map editor and other tools).

Abacvs website
Mod-Project website