They are there in live boot, but after installation they are gone.
This may create some problem in updating later on.
I request you to add the extra repositories to avoid any such problem.
How to do it..
a)Right click on your desktop and create document > empty file.Name it 'sources.list'
b)Right click on the file,open with text editor and in it paste the following lines..
deb http://ppa.launchpad.net/deluge-team/ppa/ubuntu jaunty main
deb http://deb.opera.com/opera/ stable non-free
deb http://ppa.launchpad.net/shutter/ppa/ubuntu jaunty main
deb http://ppa.launchpad.net/blueman/ppa/ubuntu jaunty main
deb http://wine.budgetdedicated.com/apt jaunty main #WineHQ - Ubuntu 9.04
deb http://ppa.launchpad.net/ubuntu-tweak-testing/ppa/ubuntu jaunty main
deb http://ppa.launchpad.net/joh/ppa/ubuntu intrepid main
deb http://packages.medibuntu.org/ jaunty free non-free
c)save the file.
d)Right click on the file,open with software sources...enter your password and add the sources.
Sorry for the inconvenience...
Good Luck!