i tried reading comic party once and didn't care for it at all. the story in question featured some guy being hounded by this girl because he needs to get a story he's working on finished in time. so he buckles down and gets the story done early. so what does editor girl do? she tears the pages up in front of him and feeds him some malarky about how manga artists produce their best work when under pressure or some such nonsense. ~groan~

if you want to read a manga that's ABOUT manga then try Genshiken. it's actually funny and gives a nice inside glimpse into the freaky OCD world of otaku. think of it as a Japanese version of the Eltingville Club.