The KDevelop team is proud to announce the sixth beta of KDevelop4. There haven't been any major features started since beta 5 as this is mostly a bugfix release (demonstrated by the list of fixed bugs). This also marks the end of the KDE 4.2 support. With this release KDevelop4 requires KDE 4.3 and Qt 4.5 to fully supply the GUI we want to provide our users with. It is also the last release that we're doing on behalf of ourselves, all upcoming betas will be done together with KDE 4.4. We are aiming at releasing with KDE 4.4.0 as we think that KDevelop4 is ready feature-wise and really needs to get a first release out of the door.
Additionally with this beta, we are also releasing the first beta of the PHP and PHP-Documentation plugins. These two add PHP language support (including classview and code-completion) and documentation-view to KDevelop. They are currently developed in playground and are shaping up quite nicely. There is no release date set on these two, however we'd like to get these into the unstable repositories of distributions.
You can find the source packages on the KDE mirrors and there are instructions for compiling. You can also check out a comparison of the KDE 3 and KDE 4 versions of KDevelop.