god, i'm sick of people asking this without searching for previous topics
a. the set won't be out till 2007
b. the set probably will not be on dvd but will probably be among the launch released for hddvd/blu-ray
c. there probably will be some changes to the movies, most notably digital Yoda in episode I, a possible integration of more deleted scenes into some of the movies/extensions of existing scene, more corrections to the original films, most notably the color glitches and the still visible lightsaber poll in ANH, and possibly more planets added to ROTJ, like Utapau, Kashyyk, and Kamino and maybe more from clone wars or the two tv shows. The major changes are probably finished tho.