This weekend I had a small pet project I did that gave me a need for a webkit based browser on Linux (Ubuntu 7.04). While I could have used Konqueror I was more interested in a later source base and so downloaded the WebKit r31738 source from http://www.webkit.org. Actually, after a couple simple apt-get install for the development library this source package will compile just fine on a rather stock Ubuntu 7.04 and runs well (Ref: http://live.gnome.org/WebKitGtk ). The default UI shell for the webkit core is ultra basic but all I need for testing against this rendering engine. One can use webkit as the engine for Epiphany (http://live.gnome.org/Epiphany/WebKit ) if you want a nicer wrapper.
Firefox 3 Beta 5: