iPhoto 6 is fast and responsive. But ... I export as JPG and what quality setting can I assign? None. I export as original, and what's exported doesn't have my edits (for the RAW files anyway).
And there's no supported way to combine or merge iPhoto Libraries.
Ok, so then there's Aperture, now at 1.1.. Still buggy by all reports. Still crashy. Slower than before, and it used to be very slow.