Thanks for the replies on this thread.
I'm wondering if I should sync my photos from my macbook iPhoto when I get the phone in a few days, or wait until the Photos app comes out.
It seems that if I were to sync my photos to the phone, I would have two libraries. My iPhoto library on the mac, then my phone photo library. When the photos app comes out for macbook next year, I'm worried it's going to be a mess having the two libraries merge.