At Valve they are working on new maps: From Valve: We are currently working on new maps, and we are planning to release them as downloadable content for the 360. I don't know what the schedule will be for that - new maps will likely be released individually on the PC as they're ready, and then we'll offer them as a single pack on the 360. We're currently testing a new map that's extremely fun, and we can't wait for our customers to try it out.