KDE 4.0.2 has just released. Here are the change logs. Updating on gutsy is as easy as ever. Fire your synaptics or your update notifications ( the orangish star in your taskbar).
Some great plasma enhancements and fixes are included. More after I get the upgrade. No singapore mirrors yet, so it's pretty slow.
PS: For Ubuntu 7.10 add deb http://ppa.launchpad.net/kubuntu-members-kde4/ubuntu gutsy main to your /etc/apt/sources.list