Many distributions work on this now:http://www.muktware.com/a/1/4/26/2011/709
I did a request for this some time ago.
Bug # 16600
It looks like Fedora, Red Hat and OpenSuse got something going on with a app store to:http://www.hatstacks.com/index.php
The repository will be very large then if you could easy pick programs from one place.
I hope Pardus will think about this to so they not be alone without nothing in the future.
I think the most natural choice for Pardus would be to get active involved in the Bretzn (KDE) project:http://socialdesktop.org/bretzn/