I realy liked the Episode Three trailer...
Alec Guiness, Darth Maul eyes, lava, Frankenstein beats, wookies, Hellraiser's cousin, light saber fights, Liam Neeson, and a sense of finality... finally!!!
Somehow it looks more Star Wars than the last two films... probably the emphasis of character over big toys.
Now if only I didn't have to watch freakn' TRL to see it!