Sadhabhishekam is a very popular staying place (and only decent one) at Vaitheeswaran Koil - Until now. Recently, they have opened another hotel , Akshardham. We ourselves were quite surprised with this place and we stayed here in Apr 2011.
The hotel is new and the rooms are clean. They are also fitted up well and the staff is relatively helpful. They get coffee and tea to the room and you may have to walk across to the Sadhabhishekam hotels restraunt for breakfast, lunch or dinner or other places nearby - see my post
The place is still under construction as they plan new cottages for people intending to stay longer.
Phone number: Contact persons Ayyappan or Senthil - 04364 - 279014