The only current mobile Adobe Digital Editions port for a color LCD device is from txtr, see
Txtr iPhone app - Adobe DRM, over the air downloads, and more.
There is supposed to be one soon from HTC for some of its phones, see
HTC Touch Phones to get Adobe Digital Editions.
Adobe is locking down mobile ADE by contracting with manufacturers, one device at a time. It has desktop versions for Windows and Mac, so a Windows tablet would work (but would also be expensive).
It is certainly possible that someone like Astak could include mobile Adobe Digital Editions on a WinCE or Linux based color handheld tablet, but it has not happened yet.
Many old (and some new) WinCE devices support MobiPocket Reader and/or eReader Reader, see
DRAFT - A Beginner's Guide to WinCE Ebook Reader Software.