For those wanting the latest crack-of-the-week, packages for the release of the KDE Software Compilation 4.5 RC 1 are available.
Users of 10.04 LTS can install it from the Kubuntu Beta PPA.
To update, use the Software Repository Guide to add the following repository to your software sources list:
Packages are also compiling in our maverick development release.
Thanks to lex and shadeslayer for packaging this release.