Nowadays, it seems that the audio and video of most of the Tamil films have been released in internet much earlier than its official launch. Sivaji was the pioneer in this too and following the film, most of the audio of Tamil films including ATM, Billa have been released first in the net and then only they hit the stalls.
Now in the series of the release of pirated audio, some of the portals have released the audio of Simbu's Kalai (all songs), Kettavan (one song), Vaaranam Aayiram (2 Songs) in the net (sweetmiche.com). The quality of the audio is also good!
The same website has also published 80 MB size Billa movie, four days ago in its pages. When asking about the leak of audio and video nobody was shocked and all replied coolly that nowadays, these are all becoming casual happenings in the digitalized profession!