I know OP asked about calling rates to India...FYI there's a 1,000 minutes India calling add-on for $20 per month (available to all customers outside of Manitoba).
If 1,000 minutes per month calling India isn't enough, you could get the unlimited UK calling plan for $20 per month, and then setup UK forwarding numbers to contacts in India (regardless of whether the Indian numbers are cellphones or landlines). Then you'd get unlimited calling to most of the world (at least most of Western world, Latin America & Asia) through dialing UK forwarding numbers.
I followed Allan's links and it says "Oh snap! Looks like this page wasn't found on our server. If you got here through your bookmarks, the page may have been deleted or moved."I am unable to see the rates, but I'd imagine that anyone looking to call overseas on a regular basis would greatly benefit from the add-ons.