Dish TV has plan to introduce internet facility through DTH in India by June this year. The existing customers of Dish TV have to change their receiver dish and set top box (STB) to get the facility of high speed broadband facility through DTH.
Airtel has plan to inter into DTH market by the end of year 2008, Airtel DTH service will include broadband internet facility. So you have to wait untill end of this year to get this service from Airtel.
Reliance is also jumping into DTH market in India in near future. Reliance DTH service will also include broadband internet service. It is hard to predict when will Reliance DTH service will be available. It is sure that Reliance will give internet service at cheapest rate.
TATA Sky has no plan currently to provide internet through its serve.
The best things with internet by DTH is- too much low cost and super high speed. If this facility will start in India, penetration of Internet in India will increase many times from current level.