Well Microsoft has finally released the new version of Internet Explorer, 7. IE6 hasn't really been updated since 2004 and really lacks some features which I personally find incredibly irritating as a web developer and a web user. IE7 introduces some handy features like tabs and a funky screen where you can see thumbnails of all the pages you have open in your tabs on one page.
If you really cannot stand to switch to Firefox or Opera, please download the final version of Microsoft Internet Explorer 7 from microsoft.com/ie, it's the least you can do!