Kdevelop 4 and kdevplatform beta8 .deb packages for Kubuntu Karmic 9.10 (with kde 4.4 from ppa:kubuntu-ppa/backports) are available on my PPA.

I moved all kdevelop packages in a new PPA, you can add it running:

sudo add-apt-repository ppa:daniele.domenichelli/kdevelop
sudo apt-get update

(you should also remove my other ppa’s if you just use only kdevelop packages)

Then to install kdevelop, just run

sudo apt-get install kdevelop

You might also want to try beta plugins released with kdevelop…
Just install the plugins you need:

kdevelop-plugin-executebrowser
kdevelop-plugin-executescript
kdevelop-plugin-php
kdevelop-plugin-php-docs
kdevelop-plugin-xdebug

before installing them, if you installed kdevelop-php and kdevelop-phpdocs packages from my ppa you should remove them:

sudo apt-get purge kdevelop-php kdevelop-phpdocs