After a few days of use I really have been enjoying the iPad and think there will be a lot of uses for phtogoraphers. Once some more apps are built I think it will be a very nice mobile device to showcase images, do some quick proofing and makes a great entertainment device. Email and web are very good and its so much more portable compared to a laptop, it is going to replace my laptop for most uses.
I wrote some a first look review here;
Apple iPad first look