Originally posted by wlachan You can fit a 1TB hard drive in notebook now, and some can handle 2, or you can replace the DVD drive with another. That should be plenty on the go (with shorter battery life as penalty). I use SyncBack to keep my 3 sets of drives identical, but I am nor sure about Photoshop catalog. If you need to edit large amount of raw, LR is the way to go. My only concern is that most notebook monitors cannot be well calibrated so any serious PP is impossible.
+1
I have two 500HDD in my MacBook Pro 15''. I removed the CD rom and replaced it with a 3rd party caddy which holds my second HDD in place. You could have SSD + HDD combo as well.
I mainly use LR3 to process my RAW files. I only shoot RAW so there are a lot to process. I then use CS5 for advanced processing when needed.