If your product is futuristic and really needs stuff IE doesn't support (say, advanced HTML5 stuff) - OK. But if you're just doing it out of laziness then it'

If your product is futuristic and really needs stuff IE doesn't support (say, advanced HTML5 stuff) - OK. But if you're just doing it out of laziness then it's a bit silly. All the major CSS and JS frameworks pretty much eliminate the cost of supporting IE. These days the cost of supporting IE7/IE8 for me in a standard web site is fairly negligible. IE6 is another matter.