If you are a Yahoo! Mail user and your currently using IE8 you will love the feature called the Mail Web slice that is available as part of Internet Explorer 8 optimized for Yahoo!. The Web slice gives signed-in users quick previews of their Mail right from a drop-down page within browser, so no matter where you are on the Web, your Yahoo! Mail is right there with you. To use this feature – after downloading the Yahoo! optimized IE8 – make sure you’re signed into Yahoo!, then just click on the Y! Mail slice on the favorites bar whenever you want a preview of your Inbox.
Read the full article on Raj Ramabadran’s blog at http://rajramabadran.wordpress.com/2009/05/14/yahoo-optimized-ie8-web-slice/