i got news from chibi yuuto website that XXXHOLiC Rou OAD will be on air in spring of 2011.
here the link opening video,
http://www.youtube.com/watch?v=4sPUxoseN8Y
and the song tittle Adayume (あだゆめ),
as always the song from Suga Shikao's(album SMILE).
more information from chibiyuuto san livejournal,
http://chibiyuuto.livejournal.com/
u can donwload the song from here http://www.4shared.com/get/qTm9SCyi/Suga_Shikao_-_Adayume.html