Looks like BLR is not on the schedule yet but it's on it's way....maybe they've got some sort of deal with IC or 9W using the Chennai flight for now.
http://business-times.asia1.com.sg/s...,84798,00.html
THAI to add flights to 5 Indian cities by 2004
(BANGKOK) Thai Airways International plans to start flights to five more Indian cities by 2004, doubling its seat capacity and sales on routes to the world's second most populous country....
Chennai is the first of these cities, followed by Bangalore, Varanasi, Gaya, and Guwahati. Thai already has service to Delhi, Mumbai, Kolkata.