Epiphany adds support for WebKit
It's old news that WebKit is specifically for Safari on the Mac. As Apple ported Safari to Windows and Adobe has integrated WebKit inside their AIR platform for Windows and Mac. But WebKit is coming to your Linux desktop as well.
While the team behind KHTML and WebKit are cooperating together to merge their code base after a long split, the developers of the GNOME desktop browser Epiphany have made it possible to run builds where Epiphany uses WebKit, not Gecko, to render the web.
Although this doesn't imply directly that Epiphany in the future will be WebKit based, it does open opportunities for their users to switch engines and don't have a vendor lock-in on the rendering core. Remember, the common goal should be to open the web, not to be IE or Gecko specific.