Just highlighting a word, and then using the floating conditional Activities toolbar (kind of like the one in Office 2007) presents me with a number of options based on my selection. Choosing 'Map with Live Maps' brings up a snapshot of the location in Virtual Earth! Pretty cool I'd say!
Similarly, again using the floating toolbar button, I can translate a piece of text, instantly, with a Live Translation activity! Very handy!
Read more about IE8 here: http://blogs.msdn.com/ie/ and download the Beta 1 here: http://www.microsoft.com/windows/products/winfamily/ie/ie8/default.mspx