Left 4 Dead DLC news soon

Left 4 Dead developers Valve have announced that downloadable DLC for Left 4 Dead will be available on the Xbox Live market place soon. They have yet to announce details, but they said that details will be released soon. By the looks of it, the content will include nothing but new campaigns and/or weapons, considering that new enemies would be too hard and that a new party of survivors would be too big a leap.