A buddy of mine showed me this player made campagne for LFD2. It's a full 4 or 5 maps - events and alot of cool custom stuff like tanks in football uniforms and foam finger melees. Heres a link to the DL page.

http://www.l4dmaps.com/file-download.php?file=9754&entry=38651

Be sure and check out some of the other high rated maps on the L4Dmaps site. Another I have tried DLing but got an error installling was "Questionable Ethics".

Here's to being knee deep in zombie parts!