As of January 24, Jaunty Jackalope has been included among the versions of Ubuntu covered by the Medibuntu archive. Medibuntu is dedicated to distributing software such as Real Player or certain codecs that cannot be included in Ubuntu for various reasons, including patent, or legal restrictions in some areas.
Included among other things in the Medibuntu repositories are Adobe Acroread, Real Player, Google Earth and Skype.
The easiest way to add the Medibuntu repository for your version of Ubuntu is to go to System > Administration > Software Sources, click on Third-Party Software, and then add the following:

deb http://packages.medibuntu.org/ jaunty free non-free
replacing jaunty with your distribution name if you are, for instance, using intrepid or hardy.
Once you have included the new repository, make sure you go into System > Administration > Synaptic Manager and download the Medibuntu key. Then, you won’t get errors saying that the other things you download from Medibuntu can’t be authenticated.
Happy downloading!
You are rather preaching to the converted.
May I suggest you leave messages about Ubuntu in blogs devoted to countering the Conficker virus. They’re the ones that need to learn about how good Ubuntu is.
I know. It’s the best thing since sliced bread, as the old saying has it!
My initial plan with the blog was to give hints about how to make the Ubuntu experience even better. I then found out that there is always so much breaking news! Thank you for your comment.
I still think it’s a good thing blogs such as yours exist – it was one of the first Google hits for me when I searched for “jaunty medibuntu repository” and contained exactly the info I needed, so thanks for this entry!
You are most certainly welcome. Glad to know I could help.
You helped me too. I am grateful.
ds
Thank you very much.
what raphael said!
just a quick search & i got what i was looking for
-long time (novice) linux user
Thank you.
Glad to know I could help.