Update: KDE 3.5.1

KDE 3.5.1 is out - here's how you can get it:

Edit your source.list

sudo kwrite /etc/apt/sources.list

and add the line:
deb http://kubuntu.org/packages/kde351 breezy main
Save and close, type into your konsole:

sudo apt-get update && sudo apt-get upgrade

There are no new features added but a lot of bugfixes, as you can see here