Lots of people have been shopping around for low priced .IN domain registrations. Looks like
GlobalFusion has the best current prices at just $13.99.
Keep in mind they are just a reseller for DirectI.com, but GlobalFusion's $13.99 promotional pricing is $4 less than what DirectI charges.
I personally have regged names through GlobalFusion, and despite becoming frustrated with the whole pre-registration process (it was DirectI's fault), I think it's a pretty good deal overall. They accept Credit Cards and PayPal.
Link:
GlobalFusion
