One of my most-asked questions during my last two Lightroom seminars was “How do I get my photos out of iPhoto and into Lightroom.” Matt got a lot of the same questions during his stops as well, so I asked Matt if he would do a short video for our students on how to make the move painless.
That video is up live over at Matt’s LightroomKillerTips.com site (Here’s the link). Thanks Matt! :)
I had this exact same issue, so I decided to build a script to help me out. It copies the original images from iPhoto and separates them by year and event. If you’re comfortable tweaking python, it’s easy to adapt the script to copy the modified images too. You can get the script at: http://kutuma.blogspot.pt/2012/05/moving-from-iphoto-to-lightroom.html
Hope it helps!
Rodrigo
that link goes only to a blog with a ton of ads on it