I wish people would stop hating on opera
I've been using opera since 3.72. While I don't agree with some of the saber rattling, there are some legitimate concerns. Back in 2003, microsoft had 97 % of the market share and that included IE for mac. Netscape was a terrible unusable mess. Opera had twice the features and vast speed advantage. The problem was that it at the time was very strictly abiding by web standards and nothing on the internet would work because of IE optimization. Now IE 6 is the butt end of the internet, and it didn't deserve half of the market share it had.
If it weren't for a couple of open source options like the khtml and mozilla proJects, the internet would be a steaming heap of crap right now.
This is a complex problem. My solution would be mostly what microsoft has done. Make IE removalbe which it wasn't before(all it did was remove a shortcut on the desktop like we wouldn't notice). OEM's have a choice, whether is microsoft, firefox or whatever. End users don't get browsers in the upgrade, because they would already have a working copy of a browser. Full retail install copies get IE because its a clean install and as it has been stated the browser is part of an operating system that can't be removed as it would leave you without an alternative.
I wouldn't complain at all if Internet Explorer wasn't such a horrible browser to begin with.