If you feel as though you are missing out on some of the Webkit love in KDE4, you may be interested to know that you can switch Konqueror’s rendering engine to Webkit with a few easy steps.
If you are running Kubuntu 10.04 with KDE 4.5, all you need to do is follow the instructions on this post on Digitizor.
If you are still running KDE 4.4, you’ll want to go here for instructions on how to upgrade.
You should start to enjoy a boost in speed at the end of it all. The Ars Technica article linked to above refers to an unforking of Webkit & KHTML. It’ll be interesting to see if the lines blur between them and maybe see more of Webkit on the KDE desktop in the future.