Yes, as announced previously, finally the IE8 is ready (RTM)!!, you can download it from: http://www.microsoft.com/windows/internet-explorer/default.aspx
There are really interesting features on the Internet Explorer, but the main focus was always the security, just few features that I like: the Private Browsing, that will help a lot when you go to the Internet Cafes or navigate in a non secure environment you can use that feature in order to not left any trace on the computer (no cookies, no files, no history, nothing!). Also another interesting features are the Web slices and the Accelerators that help the users to interact with web sites and services in a new way!, besides the colored tabs (nice feature) and the Compatibility feature (that helps the user to behave the IE as previous one, for compatibility reasons)....You should download it and try this!, and remember that this will built in on Windows 7!