Browse iPhoto library in photoshop or bridge
I also thought Photoshop CS6 had an little iphoto panel or something but this solution may be just as good.

It's easy to overlook but you can actually see your iphoto library when you are in the file>open... (or place...) window browsing files. 

If you look on the left of the window where your home folder and other directories are, you'll find at the bottom there's a section called "MEDIA" that should have Music, Photos, and Movies. Click the photo section and the browsing window will change to a little mini iphoto browser. 

I hope that helps. I'm not sure about what versions of Photoshop/iphoto this works for. I'm running Adobe CS5.5 (photoshop v5.1) and iPhoto 2011. I just upgraded to Mountain lion from Snow Leopard and it works with both those operating systems.