Browser free OS?
So what about all the applications that expect to find a browser?
And if you haven't got a magazine CD with Firefox on, how would you install a browser from the web - unless MS ship some form of FTP client?
That Browser Ballot page looks interesting and could possibly get around the EU legislation - perhaps they could also do a media player ballot while they're at it... and a "productivity software" ballot (i.e. office suite)...
Hell, go the whole hog and offer to download rival OSs (e.g. Debian, Fedora, FreeBSD, Mandriva, Mint, OpenSolaris, OpenSUSE, PCLinuxOS, Slackware, Ubuntu ... and maybe even something that attempts to ape Leopard - but on x86 hardware)