I seem to be using the Windows beta of Safari more and more. I can’t say exactly why. Some how it just feels right to me. One thing I do miss is the excellent Firebug plug-in for Firefox. But fret no more! There is something similar in Safari called Web Inspector. It requires that you add a line to the preferences file to enable. Instructions can be found here.
The Web Inspector can be opened by right clicking anywhere on a web page and choosing Inspect Element. Once open, it highlights the node on the page as it is selected in the hierarchy. You can also search for nodes by node name, id and CSS class name.