I’m not sure of the exact firmware update, but at some point “Update All” was removed from the App Store. With apps updating all the time, it was incredibly annoying to have to click and wait for the app to download/install before being able to click again. With firmware 2.2 it appears that Apple has heard the pleas of all the users who have installed apps that appear to be heavily updated. To be sure, there are more updates than I would expect (and I know those iTasteWine users are anxiously awaiting more functionality), but that’s no reason to penalize people who want to update.
Anyway, I had four apps update yesterday and I used the “Update All” magic and the world was good again.