Happily, Ken was right on top of this update. KA has been updated:
Software: Keyword AssistantAs with all prior versions, you need to switch to an Admin account to install KA. I've complained about this to Ken (at least it should provide a helpful error message), but it's hard to bellyache too much about a free product.
This version requires iPhoto 4.0.3 - iPhoto 6.0.6 and Mac OS X 10.4.8. It runs natively on Intel- and PowerPC-based computers. See the changelog for what's new.