You can make custom search providers it's pretty easy.
Thanks, I didn't notice that link before! I added the Google's "I'm feeling lucky" as a search provider and now my addressbar is working like Firefox's awesome bar(?). I can write "yle tekstitv" to the bar and I'm taken automatically to www.yle.fi/tekstitv.
Btw, the IE9 has been today announced for Windows Phone 7.