KDE 3.5 Released
Seems like I've got something to do tonight at home: KDE 3.5 Released Currently, I'm using version 3.4.3 in the (K)ubuntu Breezy version. There's a separate KDE 3.5 repository for Ubuntu users:
deb http://kubuntu.org/packages/kde35 breezy main
Just add it to /etc/apt/sources.list, update and upgrade.
By the way, the KDE web site has a visual guide which explains some of the new features. It makes clear what's hot and new in KDE, in an easy way.