It might be good, but... you always have to be wary of these things as far as Star Wars. Any other kind of media besides the movies (that isn't animated) would seem to be very, very good to actually be a success. I mean, I'm interested, just a bit apprehensive.
But as far as other EU series, that all depends on how the live-action series does in '08. And no, I don't think it should be about EU material that has already been done - i.e. Thrawn, LotF, Yuuzhan Vong (Lord no).