Wow, thanks to archeather on the IMDB boards, we now know that Tyler Hoechlin was one of the mysterious finalists for the role of Edward. Tyler's trivia section cites the following:
"He was one of the final two being considered for the role of "Edward Cullen" in the film "Twilight", but lost out to Rob Pattinson."
Can you imagine Tyler as Edward? Then it would be his mug plastering all these Twilight fansites, not R-Patz's.
Related: Who is Tyler Hoechlin?