Here's a cool IE8 add-on: AdBlock Pro. I've been using it for a week, and it works fine.
Ad blocking your browser is one of the feature most geeks can't live without. I have mixed emotions about them. Business that depend upon them advertising just hates them. Google will be happy to control ad blocking over their new browser, but until them, you'll have to stick to Firefox and IE to get it done.
Thanks for the tip, Pita.