After commiting a compile-fix for kmail, I finally managed to switch to KDE 3.5 Alpha. As you can see on the right, Konqueror now passes the acid2 browser test for standards compatibility (beside Safari it's the only Browser that does - Internet Explorer, Firefox and Opera all fail, Microsoft already announced that even IE7 won't be able to pass acid2 - I wonder what the IE-devs are doing all day).
Probably more interesting for reality usage is that kde 3.5 finally supports automounting based on pmount with the new hal/dbus-API. I also happily noticed they fixed an annoying bug in konquerors ssl-handling when trying to permanently accept certificates that were issued for wrong hostnames.
Gentoo users can try it out by copying the kde 3.5 section from the package.mask-file to /etc/portage/package.unmask.