Click here if you're a grown-up and can handle the original version of the illustration above, with stylized, un-mosaic'ed retroboobage. Flickr user Ben Pearce has a spectacular set of seventies images from magazines, advertising, entertainment packaging, and other forms of media. Some of them include nudity, so caveat Flicktor. The sexy cocaine starship fantasy art above is my favorite, but I'm also kind of nuts about the Wookiee posse.
Update: Bonnie from Lucasfilm sez, "That family shot of the Wookiees is cool, but not retro. It's from the movie "Revenge of the Sith" which came out in 2005."