Do these templates work with PowerPoint 2007 or 2010?
You can essentially open the PowerPoint templates in PowerPoint 2007 and 2010 -- and use them.
However, these templates don't use the underlying theme effects in PowerPoint 2007 or 2010 -- we do plan to create PowerPoint themes, and we already have created many of these in-house -- but these will have to be extensively tested before we make them available on the site.