I just had this same conversation with one of my bridesmaids. We were both at a Hindu ceremony in December, and the bride walked into the girl's theme song from Slumdog milliionaire. It was really pretty.
I hope you don't take this the wrong way (of offensive, though, it probably will come off as so) because I do not know anything about the Indian or Hindu culture, but I think it would be fun to dance in to the song:
"Mundian To Bach Ke" by DJ Panjabi, feat Jay-Z
Not traditional, but fun. Of course, you would have to edit it or at least find one that's just instrumental. I think Jay-Z goes into a lot of things with pimping and stuff which would probably be not cool at a wedding. ahahahahah.
Re: entrance song
"Mundian To Bach Ke" by DJ Panjabi, feat Jay-Z
Not traditional, but fun. Of course, you would have to edit it or at least find one that's just instrumental. I think Jay-Z goes into a lot of things with pimping and stuff which would probably be not cool at a wedding. ahahahahah.