Adding a "Ribbon" to www.TestMash.com

Over the last few months, I've been doing a bunch of prototype'ing on http://www.TestMash.com/ and I've finally started re-designing the navigation to have a bit of a ribbon-style like Office 2007.  Most of what you'll find on TestMash are prototypes using using RSS feeds from Windows Live and/or the Live Search API.  Pleaes check-out the new "Ribbon" UI and let me know what you think by leaving a comment.  Thanks--
--Rob