Star Wars HD

I was thinking about it today and got to wondering why Star Wars hasn't been released on HD DVD yet. George Lucas is always looking for new ways to cash in on the franchise, so I can't help wondering what he's waiting for. At this point the only logical explanation I can come up with is that he's trying to get the HD DVD people and Sony into a bidding war to bribe him to choose their respective format. Of course, if he goes with Blu Ray I'll have to punch him in his swelled head.