- Make Firefox 3/3.5 look like the Firefox 3.7 -

Well, that sure didn't take long.
Just days ago Mozilla posted a few conceptual images displaying a new default theme for Firefox 3.7. Thanks to DeviantArt user Boneyard Brew and his friends, you can now tweak your existing Firefox 3 install (provided you're not running 3.6) look pretty dang close to the mockups.
You'll need to grab a couple things to pull off the transformation:

The end result is pretty faithful to the mockup. Pull the switcheroo and confuse your pals - tell them you got your hands on an early pre-alpha (Make it more convincing with a quick Titlebar Tweak)!