Jason Geyer posted a followup to his Rejected Star Wars entry, which has now spread all over the fannish blogsphere:
A few things I did want to clarify about the “Rejected” Star Wars concepts: “Rejected!” is the name of my ongoing series of unmade stuff. But not all of these were rejected by Lucasfilm. We don’t know how many of these were actually seen by Lucasfilm- they were presented to Pepsi first and then those concepts they liked were sent on to Lucas Licensing. So possibly a very small sample was shown to Lucasfilm.