Devil's Due Webstore: Link
iTunes Jericho Application (for iphone/ipad): Link
comiXology Desktop Reader: Link
This is in beta, the log in feature and the payment feature are still being worked on. If you go to the comiXology home page you can create an account.
Your Local Comic Shop: Link
If they don't have it on display, ask them to order it for you.
Tentative release date of issue #4, per www.tfaw.com is July 7th.