Grey - I don't think people will mind using screenshots to advertise their games. If you mean grabbing screens from other websites then I'm not so sure. I reckon in general it will be ok, but I intend to add a little credits section to any page that uses screenshots that weren't taken by one of the authors.
Jason - I'm looking forward to seeing what you write next :)
Jason - I'm looking forward to seeing what you write next :)