KDevelop 4 is now available in lucid-backports for users of the newly released 10.04 LTS.
Enable "Unsupported Updates" in your software repositories and install "kdevelop".
Several applications have made beta releases and packages are available for Kubuntu for anyone wanting to test and give feedback to their developers.
Amarok 2.3.1 Beta is available for Kubuntu 9.10 while Amarok, KOffice 2.2 Beta and KDevelop 3.10.2 are available for Kubuntu 10.04.
To update, use the Software Repository Guide to add the following repository to your software sources list:
The second beta of KDE SC 4.4 has packages available in our Beta PPA. There are also betas of Amarok and KDevelop available.
Users of our latest development release, Lucid, can upgrade to the latest packages.
Users of our stable 9.10 release can install it from the Kubuntu Beta PPA.
deb http://ppa.launchpad.net/kubuntu-ppa/beta/ubuntu karmic main
Then do sudo apt-get update then sudo apt-get dist-upgrade and sudo apt-get install kubuntu-desktop.