Actually in Tsubasa Chronicles Resovoir (i can't spell it z.z) pretty much all the characters have been reused from past CLAMP anime, (Cardcaptor Sakura, Magic Knight Rayeath, XXXholic....it goes on) and put into a different situation. i peronsally love having these characters back, particuarly because I love Sakura and Syaoran <<Okurama said:a very weird anime, but its cool, the thing i don't like is that sakura and li (correct me if i spell wrong there names) from sakura card captors (never like it, really) and makona (or something like that, from rayearth, which i only seen the OVAS) appear in this anime, pretty weird that some other anime characters in some new anime, can they just let the characters die with there show (though this aren't the only characters that appear, but i really am not interested in this anime, i know is a very good one, but not my type of anime, i always pick my animes just because of the characters in them, thats why i also don't like naruto).
The basic plot of TCR is the Princess, Sakura, loses her memories, due to someone trying to steal her power so Syaoran, her childhood friend, gets sent to Yuuko the time witch (or witch of dimensions something like that <<) and meets up with other people from other worlds as well who all have been sent to Yuuko for different reasons and they go in search of the feather's which contain Sakura's memories.
It's quite enjoyable :3 I've only watched a few episodes myself, although i've read about 10 volume of the manga xD