Meanwhile MTNL has been advertising free trial of 3G services for its Trump and Dolphin GSM customers. I checked it out on MTNL's sparse web site. Here.
Basically, this is only a trial. It only works in Delhi. And even there it works at Connaught Place, Sanchar Bhawan, Rajaji Marg, India Gate, Pragati Maidan, Delhi Gate and Minto Road.
No tariff is stated and MTNL says it will be announcing it in the near future.
So that's it for 3G in India.