Moving off of outmoded WebCore, The Omni Group has come out with OmniWeb 5.5, based on WebKit. In my tests, it still has some bugginess loading certain websites, but on the whole, it’s a solid browser that I find using as my trusty secondary (after Camino, of course).
This release is important because it adds yet another to the growing stable of WebKit browsers in the wild.
It also sets a number or precedents with regards to visual tabs, customizing your surfing experience web-wide or at the individual site level and adds RSS subscriptions to its standard feature set. It’s still not the perfect browser, but it’s certainly a contender (though with a $30 price tag, I’m not sure anyone but Omni fans will be willing to ante up with so many decent competitors out there).
Factory Joe 
I’m a proud license holder of OW 😉
I use OmniWeb as a secondary browser as well (when Firefox 2 slows down) and I really love how it does tabbing and how it loads about as fast as Safari. So what do you like so much about Camino that makes it your first choice? I found it to have poor support for Flash and lacking the wide array of extensions available to Firefox users.