The Left 4 Dead SDK is now fully released, it should update automatically if you had already installed the 'L4D Authoring Tools Beta'. To get the full details of the update read the
L4D blog post about it here. There are already a few good L4D custom levels out there up for download, including
this one posted over at Interlopers. Also check out some of the new sites started up around L4D meant to catalog all the new content being created for it!
Mapping for Source keeps getting better and better! It must be impossible for a mapper not to have any inspiration these days!
