IE8 is faster, and safer than IE 7 or 6. It is also compatible with more sites than any other browser. If you are concerned with the way IE 8 will interact with sites you are visiting, you will be pleased to hear about a new feature that comes with IE 8 called Compatibility Mode which allows you to view sites as they would appear in IE 6 or IE 7, with the added security and speed of IE 8.
Here is a link to get you started:http://www.microsoft.com/windows/Internet-explorer/default.aspx
IE 8 Outreach Team