Google announced Chrome, their Webkit-based browser, yesterday. Before Apple released Safari 3 for Windows, I wanted Google's rumored browser to use a rendering engine based on KHTML (there were no KHTML-based browsers for the Windows platform). But now that we do have Safari 3, I wish they had used Gecko. It's far better than Webkit, and some upcoming features are going to make it that much better.
I guess it is a good thing, though, that Google chose Webkit. Maybe with Google working on the project, Webkit will get some much needed improvements.