I don’t have the time, inclination or grunty machines to play around with Virtual machines just so I can test a website in IE6 (after IE7 ‘magically’ appeared). When I say ‘test’, I actually mean hack an IE-specific CSS together with some box-model workarounds. I digress…
Enter Multiple_IE. It’s not perfect (it’s a hack in itself), but it suffices in most cases so kudos for that… You even get the nostalgia of IE3