I would pay to be able to edit the CSS of live sites and see the CSS take affect. I would pay but I don't have to with Firefox and the Firebug and Web Developer add-ons. I have written about Firebug before, which has been both a life saver and a productivity booster in that it gives you the ability to quickly identify elements within a design. Web Developer is an add-on I feel that I should have known about and am kicking myself for not knowing about it sooner. Besides the plethora (been waiting to use that word) of options, it gives you the ability the see and edit the CSS files affecting the page you're on and the edits affect the site live.
Since the first Mac Minis were released, I've been combing the Internet for a deal. I don't really need another computer but there is something about having this tiny, quiet box on my desk. The price has always been holding me back: it's not in the $400 sweet-spot for a computer. Yes, I know that Apple is not a lower-end brand but the pricing on the Mac Minis compared to its features, including the hardware revisions released today, is ridiculous.