I admit it, I'm spoiled...

I've been using Firebug for I don't know how long but at BarCampDC this year, my eyes were really opened. That's when Russell Heimlich taught us that Firebug could be used for far more than just inspection... it could be used to live-edit the css and html of a page and see the results in realtime. Since I've picked this up, the previous edit, save, reload, groan, repeat is gone! It has become stunningly simple to edit a site, figure out the proper spacing and alignment, copy, paste, validate, done! It's been such a wonderful and effective solution that just works.

Well, almost... because then there's Internet Explorer.

IE7 works about what you'd expect and tends to behave. Other than a few issues with alignment, it honestly isn't too bad. My only criticism is that Microsoft took so long to get it out.