iPad reads Adobe DRM ePubs just fine!
The iPad can read any DRM ePUB. It reads any DRM eBook. All you have to do is download the reader app that will read the book.
For Adobe DRM ePUbs, all you have to do is to download the FREE Stanza App (owned by Amazon).
For Kindle DRM books, download the Kindle App.
For Barnes and Noble ePub books (which uses the Adobe DRM), download the Barnes and Noble app.
For Sony ePubs (which uses the Adobe DRM), download the Stanza App.
For Apple Fairplay DRM ePubs, download the iBook App.
As the Apple ad goes, "There's an app for that!"
The iPad allows unprecedented freedom for readers. You don't have to worry about DRM any longer since the iPad can read ALL OF THEM.