You can buy the public designs (I have a few in the mail on the way here now). The prices are really reasonable, starting at $18/yard. Another thing, some very talented sorority ladies have discovered the site and they've created some prints that (dare I say) rival Lilly's sorority patterns. Okay, maybe that's an exaggeration, but they're beautiful.
Rather than talk about it, I'll just post a few samples and let you head over there yourself if you want to take a look and maybe make some fabric!