Via Microsoft's Access blog: a flash app that shows where an Access 2003 command moved to in Access 2007: Interactive: Access 2003 to Access 2007 command reference guide. There's also a link to documentation.
I'm not a fan of the ribbon bar, though I suspect I could come up with a defense for it. It provides zero value to me when using Access 2007, in fact in most ways Access 2007 is either a weak improvement or a regression. The ribbon bar works a lot better in Word, and Excel seems to have mostly ignored it.
I have to give credit though, this is one amazing Flash tutorial. I couldn't figure out where "compact and repair" went to, this tutorial answered my question immediately. On the other hand, it didn't tell me where the dependencies feature went. I think that's supposed to be resolved by the Access 2007 table/query view, but that appears to be broken for now.