We recently added a ribbon bar control to our components suite. One of the cool and unique features is that it supports Windows7 Scenic look and feel besides the standard Office2007 styles. You can change the style of the RibbonBar control by setting the RibbonStyle property.
You can find more about SuperRibbonBar at the Winforms Ribbon interface product page:
http://www.viblend.com/products/net/windows-forms/controls/ribbonbar.aspx