Remember to include space for them to write how they would like the book personalized and include shipping cost when giving price information. Pictures of the art or products can be scanned in and details can be given about how each can be ordered, either on-line, directly from the illustrator, or from a retail outlet. Some authors and illustrators have forged friendships from e-mail their site generated. This is a good feature to have on a site, unless you are concerned about receiving a large volume of mail that you won't be able to answer. You should query people first for permission to put them on a mailing list.
Internet users are very prickly about having their addresses used for promotional purposes.