I’ve got to say, I’m impressed that this is happening. From the IEblog…
The core of my team’s job is to make IE7 and Windows Vista so compelling so that people choose our products. The people who work on Windows want you to have a good experience, whether you use IE or not – for example, Windows Media Player has a Firefox plugin. I also recently got a chance to play with a new Firefox plugin that simplifies and improves the Windows validation process on that browser – since, as I said to Scoble a long time ago, it would be arrogant for the people working on a product not to use other products in that category.