For your order reports, shopkeepers are only given a bare minimum of information; however, shopkeepers are NOT to research customers based on this information in order to contact them. This has happened in the past, and Cafepress has dealt with those violating shopkeepers. The information can be helpful in looking for repeat customers and general demographics, and nothing more. The same applies to newsletter subscribers who may not want to be contacted individually. A subscriber could blame Cafepress for violating the policy.
While Cafepress is working out ways for shopkeepers and customers to contact one another through their stores, no time has been given on when that will be released. If you would like to see the emails of your subscribers, you will need to set up a 3rd party tool separate from Cafepress. If you would look to communicate to your customers or receive feedback, please list your contact information within your store, or use a contact form on your own website.