Computerworld just posted a favorable review of RibbonCustomizer (Classic Menus and ToolbarToogle were also reviewed):

“Hands on: Show Office 2007 who’s the boss“

Excerpts:

“RibbonCustomizer Pro costs $30 and works with Access, Excel, Outlook, PowerPoint and Word 2007. If you like the Ribbon but wish Microsoft had put the commands and options in a slightly different order, or if you have custom needs for particular projects where the tool bar icons would work better for you in a different arrangement, RibbonCustomizer is for you.”

“If your only need is for a set of commands that look like those in Word, Excel and PowerPoint 2003, RibbonCustomizer has an offer you shouldn’t overlook. The developer offers a free Starter Edition. If you want to get your feet wet with a retro menu, it’s a great way to begin. […] and you essentially have Classic Menu without the cost.”

Go directly to the RibbonCustomizer section of the review.