this is a question that has been tossed around on the old fourms, but thanks to the magic of a dsl connection and the kindness of mr. lucas i have an answer regarding which sabers anakin will be using in episode 2.
i refer all interested to the "making the film, part 4" series on the official site. if you look closely, as anakin is jumping out of his yellow speeder(i presume this during the coruscant chase scene) the bottom part of his saber hilt is visible on his belt. it has the same grips as luke's or vaders did in episode 4(windshield wipers) so we know it will be either the graflex or heiland variety.
then we see anakin twirling around a different saber in a large area with a dirt floor surrounded by bluescreen. here anakin is using a saber similar to adi gallia's. this fits perfectly with spy reports of the arena battle in which anakin and obi-wan use the sabers of fallen jedi after escaping capture.
o.k. i have now watched parts 3 and 5 of "making episode 2" and there are full shots of anakin's saber. it is exactly like vaders heiland saber, but the emitter is chrome colored instead of black.
i'm rather suprised at the "access" these "making of " videos are showing. for someone who is supposidly secritive, lucas is showing a lot.