after delayed at 2 hours, Ubuntu Intrepid Ibex has been released by Ubuntu Developer. i cannot wait for last a few day, i am waiting for this release. finally i can sleep again with my system :D

so if you want to upgrade into Intrepid Ibex just upgrade your system via:

sudo echo "deb http://archive.ubuntu.com/ubuntu intrepid main restricted universe multiverse" >> /etc/apt/sources.list"
$ sudo apt-get dist-upgrade

and welcome to Intrepid Ibex :D