I have been using the Beta version of KK for about three weeks now, boot up times have improved, the Add/Remove programs has been replaced by the Ubuntu Software Center,this also has a much better look and feel. The Software Center is going to be developed to encompass all software handling including system updates and eventually will offer commercial software.
Forgot to add this from the Ubuntu website
"The Ubuntu Software Center is a graphical utility for package management in Ubuntu. In version 1, it will build on the basic philosophy of Add/Remove Applications and make it even easier to use. In later versions, it will grow to replace Synaptic, gdebi, some parts of the Computer Janitor, and possibly Update Manager; and in version 3, it will offer commercial software"