Here's the Wookieepedia article on the show.
http://starwars.wikia.com/wiki/Star_Wars_live-action_TV_series
From what I read, Bib Fortuna, who was Jabba the Hutt's right hand man will be in it. Oola, the twi'lek dancer who was fed to the Rancor will be in it. The kid who played Boba Fett in Episode II will be in it, reprising his role as the bounty hunter as a youngster. Gregar Typho, aka the black guy with an eye patch from Episodes II and III who served Padme, will be in it. Thall Joben who orginally appeared in the Droids cartoons will be in it. Quinlan Vos, a former Jedi, is rumored to be in it. A young princess Leia might also appear, and they'd explain how she can remember her mother. The actor who voiced Vader's apprentice and who the character was modeled on, has hinted he'll possibly be involved with the show. Also, the show will explore what people in the Star Wars universe what they do for entertainment, their sports such as podraccing, politics, and a plot involving the Death Star plans will be included.
As for George Lucas, it's good he's a producer on the show, and not the director. He works best when he does that. They'll probably be some CGI in the show, but probably not as much as it was in the prequel trilogy.