The Clone Wars show is between 2 and 3 like the other one was and is an addition to it i believe. The LIVE action takes place between Episodes 3 and 4 and is 100 episodes long and concentrates on a minor or minor characters with several main characters doing cameros
Lucas on Upcoming Star Wars Projects Source: TheForce.net, IESB.net March 5, 2007
TheForce.net received word from the Directors Guild of America where George Lucas was a guest speaker. The "Star Wars" creator talked about Lucasfilm's upcoming projects. Here's a clip:
He's very excited about the animated 3D Clone Wars TV series. He is trying to recreate the ambiance of a SW film in cartoon form – "there won't be anything on TV like it" – it'll be "smart ass comedy with contemporary humor." It won't be dealing with the Skywalker story. The emphasis is on freedom to portray anything they feel like; for instance some episodes are just about clonetroopers, another features as the main character Kit Fisto. He's going to make 100 episodes, doesn't have a network yet.
The live action series is still a few years away, no character decisions have been cast in stone. He did say that each show will be a different character.
IESB.net also got a chance to talk to Lucas and he revealed more about the animated show:
He tells us about a new character we will see in the upcoming animated series that takes place during the Clone wars. Her name is Osoka (this is a phonetic spelling, after all, with Lucas and his spelling magic it will probably be Osaakua or something like that), she is a young Padawan learner, it's her first assignment and she's very young. she's a little Togruta, the same species as Shaak Ti from Episodes II and III.