okay, I will be the first to admit it, I take back everything bad I ever said about tabbed browsing. I'm happy to have it as a feature. I don't know if I will 100% convert, but for development, it's nice to have both my test page and final published page in the same window. It makes it very easy to toggle between the two, to witness minute changes in alignment, etc.
I can't say I'm very happy about the lost vertical space, but that can easily be gained back by learning the quick-keys, "command+b", which will toggle the bookmark row. By doing this it just about makes up for the space the tabs require.
And minimizing the address bar (command+|) works out well, if you can train yourself to type "command+L" before you type your address. Or "command+T" then "command+L".
Below is a screen shot to a very minimized browser window, which is great for my laptop.