Internet Explorer 7 finally became final last week and is starting to be deployed as a Windows Update. While I believe that IE 7 is a huge step in the right direction, the changes in the look and feel of the browser will throw many for a loop. Even after working with IE 7 for the past five or so months as it made its way through the beta stages of development, I don't think it holds a candle next to the Firefox browser . If you aren't afraid to learn the new nuances of IE 7 and don't want to change to Firefox, I say go for the upgrade. However, if you are perfectly comfortable where you are right now with Internet Explorer 6, then you might want to download and install this tool , made available through Microsoft, that prevents the automatic installation of the new Internet Explorer 7.
Although it does prevent the automatic installation of IE 7, you can still download and install the new browser in the future should you choose to do so.