Best news in recent anime history.
Still remains my favourite CLAMP series, and one of my top ten favourite series of all time. Great to hear they've kept the cast, too. It'd be a bit disappointing to have a major char voiced differently (as with some sequels... >.<)
This, and the continuation of Genshiken... the best stuff around in the past few years, and with new seasons, will remain up there for a few more yet, I think. ^^