I hate crappy puns, but I still grin when someone calls Internet Explorer Internet Exploder. Download IE9 Release Candidate at BeautyOfTheWeb.com, which is another amusingly ironic URL. Or, you know, use Chrome or Firefox if you're not under the eye of a totalitarian IT department.
Maybe I'm missing something but why are companies still competing in browser wars? Is there really any strategic advantage or cost component? Sure you can help set the default search to something which may lead to ads for Microsoft and Google, but is it a space to really "compete" in?