If you don't have Showtime or haven't been able to find it elsewhere, this site has all 7 episodes that have aired so far.
Each episode has 3 links listed underneath it. Click on any of them and you'll go to a page that lists multiple download links, where the guy has uploaded the show to various free hosting sites like Rapidshare and whatever. Just pick a link from that list and start downloading. It's all good, no dubious spyware or anything.
S01E01 - Whitney Cummings (comic), Ron Jeremy (vintage pornstar)
S01E02 - Chelsea Handler (comic), The Sklar Brothers (comics)
S01E03 - Belladonna, Bobbi Starr, Kristina Rose (current pornstars)
S01E04 - Bill Burr (comic), Nina Hartley (vintage pornstar)
S01E05 - Adam Carolla (comic), Georgina Spelvin (vintage pornstar)
S01E06 - Jim Norton (comic), Seka (vintage pornstar)
S01E07 - Margaret Cho (comic), Paul Thomas (vintage pornstar)