What do you think? Will the new iBook fit my needs??!?!?!

The iBooks are great, you'll love them. Having said that, if you can forgo portability, have a look at the iMacs since they will be so much faster.

You should be fine. It sounds like the more memory you have, the better.

One thing to keep in mind is Photoshop can be ram-hungry. Although OS X's memory management is very effective in allocating an application's memory needs on the fly, Photoshop has a preference for setting it's memory allocation to a minimum amount when it launches.

If your editing huge files (such as large, uncompressed raw files), it's probably a good idea to set this preference on the high side, bearing in mind how many other open apps you'll want to have running alongside Photoshop. I think the default setting is 50% of your installed ram. You can ratchet that up if need be in order to work with large files, apply complex filters and effects, and still get home at a reasonable hour.

That sounds like a great machine for you. I do Photoshop and Dreamweaver on my 12" PowerBook (roughly the same speed as the iBook you're considering), and it works very well. I switched from Windows almost a year ago, and am really glad I did. I only wish I had gotten a Mac earlier!

you should have no problems with that machine for what you will do. You might wish for more resolution on the screen when working with lots of windows, but expose can help with that. I had to think hard to come up with that. I think that will be a great machine for you.