i think , you should skip Aakash. i and my friends pre-booked it on Dec 2011(i guess), my friend has got a call last month(2013 dec) that aakash tablet is ready to ship now
they took 2 years to process the order lol. their service is non-existing and there has been several issues and has been a news to the news channels also.
you should check other alternatives. eventhough they cost higher, for peace of mind it is better to avoid it.