Well, the rules are written so that the airplane specs can change year-to-year.

I expect a "this design always works" won't be possible year-to-year if the specs are cleverly altered.
(Sneaky minds at work, even as we speak!)
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It is a drag to see the same design year after year win.... FAI Team Racing reached that point many years ago. ALL the planes today are flying wings.. and usually ARF's from Russia. Only incredibly expensive engines make the difference in competition.
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This year's East Coast event has a slew of entries....
http://www.sae.org/students/aeroeast.htm
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And based on what I've seen out here from some of those teams, the shapes WILL be different!
That's where the 2004 specs will be released.
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There's a trade-off between how much wing you can have and still get the motor to fly it off the ground in 200 feet!
If it can't it can't fly,it can't win!