yeah, i'm a huge Thomas Ligotti fan! along with H.P. Lovecraft, he's my favorite author.
unfortunately, his career is going in reverse. instead of mass market editions, his work is now only being handled by the small press.
Ligotti has put a couple new things out since My Work is Not Yet Done (which i didn't really care for, actually). some are just new compliations of his stories, but a couple of them are brand new stuff.
check
http://www.ligotti.net for news on what he's putting out and when.
Darrick