Cool, glad you decided on the iBook. 🙂 Are you going with the 12" or 14"?
The 14" comes standard with a DVD-burner. The resolution is the same as the 12", but I'm typing on a 14" now and the resolution doesn't bother me. I don't even notice it.
Also, if you plan on using graphic programs either bump up your HD to 80 GB or buy an external HD to store all those photos, etc. It can fill you HD up pretty quickly.
The PB is generally better for using graphic programs but there is a diff in price. Also, the ibooks' specs are very competitive with the PBs right now. I used to own a PB and I personally like the iBook way better. (Not nearly as hot! I used to burn my wrists on my PB.)