[There's something odd going on with this Apple search, sometimes when I run it I get nothing of interest. It's as though Apple is just now propagating these files across their servers.]
Apple - Support - Search Results - iPhoto 6
Lots of tech notes.
I would NOT touch iPhoto 6 for at least a month. It's a really big update. Apple's big updates, at least of their consumer software, tend to have hideous bugs.
Apple is a bleeding edge kind of company, and early adopters should think of themselves as major blood donors. Of course I do appreciate the sacrifice of my friends who forge ahead ...