HTML Trick: How To Add CSS Styles For All Browsers Except Internet Explorer

I very like an idea of display a different design of the same site for IE6 users (may be even for IE7 and IE8 users) and for users of other popular browsers.
The reason is in ability of using CSS3 technology by the full, because the browsers like Opera, FireFox, Chrome and Safari already supports a lot of opportunities of this technology, they updates frequently, and we, web developers, very much want to use them on our web sites. Right? =)