A separate area of C9 should be developed to showcase Microsoft's products. Aggregate what is great about the product via video and stuff, then download links and promotions.
If it looked slick, and had great content, it could be a good resource.
For instance you would have a link to a products area. There you'd find IE9. In that section you'd see a what is great video maybe a tips and tricks video and even a how was this developed video. Same for Office 2010 and so on. There you can effectively link to the product download or promotion.