I just came across this ad for Office 2007 on the US MSN homepage which I think is great so check it out. If you want to check it out, you’ll have to do it today as it’s the only day it’ll show, but it’s worth the time. I don’t want to spoil it too much but basically you get MSN.com presented as a document in the Office 2007 interface and you’ll be able to play around with some of the menu options in Office that will actually change some things on the page. I played around with the ‘image options’ for instance to change the shape of the IMU as you can see in the screenshot below.
I’d love to see more online advertising experiences like this. (Disclaimer: I work for Microsoft).