I received this in an email today:
Thank you again for your interest in Adobe Illustrator on the iPad Beta. We’re excited to let you know the app is now available for pre-order on the App Store.
By pre-ordering the app today, you will automatically get the app a day earlier than the official announcement. The app is free for Creative Cloud members who currently have access to Adobe Illustrator.
Adobe Illustrator on the iPad is built with community, and we cannot be more excited to finally share it with you. The app will continue to evolve based on your feedback, so stay in the conversation on social at #illustratoroniPad.
Illustrator on the iPad team