It is showing all my previously ordered parcels. Though it is updated a little late. For example, I received my charger yesterday and its still not showing. However Ujjwal's parcel has reached India last month itself and it has not yet reached him.
http://ipsweb.ptcmysore.gov.in/ipswebtracking/
EDIT: The above site tracks if the parcel has landed in India or not. Its not showing any other info, for my tracking numbers atleast.
Anwar, If this is a duplicate post please delete it.
Here is one more site.
http://www.packtrack.com/
One more
http://www.track-trace.com/post
India Post main site can now be used to fully track all parcels originating from CN/HK from item booking to delivery. It used to work only after customs release/item landing. Not sure since when this service started but it's now verified for both surface & air parcels. Ipstrack.ptcmysore is no longer the only govt portal for international tracking. US/other origin parcels are yet to be verified.