Post Office Information, India

URL: http://www.indiapost.gov.in

You can track your speedpost or international mails.

You can get information of any postoffice in India, Though they don't pick the phone.. ;)

You can get information of all mail products and services available.

and many more..

Have you heard of ePOST?! (http://www.indiapost.nic.in)
Current rate for ePost is 10 Rs. per page (not more than A4) per addressee.