I have not seen Ribbon but Bob Larson seems to be the only person who does not dislike it.
let it be known, then, that i too quite like the (or should i say "do not dislike") the ribbon. this is from a user POV not developer... the closest i've come to changing the ribbon is MS and some third party add-ons.
i like the way you can quickly "tab" through the ribbon menus by simply rolling your mouse wheel over it.
i like how things are much easier to find, have larger icons, and are grouped intuitively.
it might take some time to learn, but once you do you realise just how much better organised it is compared to previous versions. this is mainly from an MS Word POV, as i haven't/don't really use(d) multiple versions of Access (only 2007).
However, when i have had the odd requirement to use Access 2003, i find myself frustrated that certain features are "buried" within the menu structure, rather than out for all to see in the ribbon.