This is an interesting and relevant question. I have raised it a few times in this forum, but somehow there was not much of a response. Yes, I too hate stretching the pictures in 4:3 to 16:9, people look fatter, everybody's nose looks never-ending on side-view, etc etc. So we sometimes used to watch in the 4:3 ratio, but that keeps black portiona on the two sides.
I subscribe to BigTV, and I think it has by far the best picture among all the DTH vendors. Believe me, I have tested and compared all those available in our locality (for a period of about 2 months). People complain about their service and slow and inelegant interface. I own it for nearly a year, I never needed any service so far, and the installation was almost immediate. I do not bother too much about the interface/software because at the end of the day, I am going to watch TV channels and not play with the interface. I did not post in that polling thread, because I did not want a fight on this. I see that Tata Sky is winning that poll, I just wonder if all people voting for TataSky have compared diligently their signals with all the other signals. If you want a proof, come and watch at my place, you would know.
The reason I am mentioning all this about BigTV is that I have a feeling, recently they have started sending some of the channels with 16:9 aspect ratio. I want to verify this from experts like "adder". The BigTV logo has a red square in which the word "Big" sits. That was initially rectangular (stretched horizontally) for all channels, but now I am finding at least some (if not, many) channels are having that as square, also the pictures do not look stretched. I just want to check with others if that is not an illusion I am having.
Regards.