The series is running a little different from the manga. I wasn't expecting Mokona to show up until they did the Tsubasa Chronicle cross-over eps. (If you watch the first couple eps of TRC, you can see Watanuki in the background). Since in the manga the Mokonas do not appear until then, I wonder how they will tie it in now.

I did see some of my favorite parts of the manga in the OP, and I'll be looking forward to some of those hopefully. If they don't show up, I probably won't mind in the end, because I really enjoy this series (loved the movie). It is probably one of the deeper series I follow. Yuuko's words (especially wonderful when delivered by Sayaka Ohara) almost always have some deep meaning when she's not getting drunk.