IGN has posted a preview for The Clone Wars that breaks down what we know so far. Nothing truly new there if you've seen all of the trailers, but it does a good job of combining all the info. On the "Is it Ewan?"..."Is it not?" front, IGN says this about possible Hayden and Ewan involvement...
"Hayden Christensen and Ewan McGregor apparently couldn't be bothered to return to voice their characters for the project. Instead, some talented soundalikes have been found in voice actors Matt Lanter and James Arnold Taylor. Lanter (Anakin) is an up-and-coming actor who next appears in MGM's direct-to-video WarGames sequel. Taylor, who voices Obi-Wan, will be recognized by most IGN readers as the voice of Tidus in Final Fantasy X."
Um, I stand by my previous hopes as nothing has come out of Lucasfilm yet. Not too much time left to find out!