Here is the Endhiran Theme Music as played in Suryan FM ( Owned by the producers of the film ):
Endhiran Theme Suryan FM - PromoEnjoy :
here is the Enthiran Audio Promo – Naan Kandathu Aararivu – by SPB ARR 
Endhiran Theme Music – Official – MP3 – Download
Posted by wiz on July 28th, 2010
Posted in Off Track 
Tags: A.R.Rahman, Aishwarya Rai, Allah Rakha Rahman, ARR, endhiran, endhiran theme, enthiran, enthiran theme, music, promo, rahman, Rahmanji, rajini, suryan, tamil, track list, Trailer
[...] is Endhiran Theme Music — Official — MP3 — Download Posted in Off Track Tags: A.R.Rahman, Aishwarya Rai, Allah Rakha Rahman, ARR, Audio, download, [...]
Second promo songs also released..
http://www.ziddu.com/download/10926817/EndhiranSecondPromoSong.MP3.html
Endhiran rocks..
First in Tamil film showing the developed scientific innovation. No one to do this type of project. Well done Mr.Sankar. Nice keep it up. Nice direction. You are showing your excellent direction in each and every cornor. Try to one step ahead from here. Mr.Rajni also cooperate with his fullest efforts. No word telling about Ais. No ice to Ays.