There are many different Google Android based tablets, from 7-inch book sized, to 10-inch widescreens, they all are very capable devices for reading EPUB ebooks on.
Available at most stores including Amazon
This is Sony's latest Reader; smaller, lighter and slimmer than ever before. Along with WiFi access, it comes with a multi-touch screen, 12 regular and 10 translation dictionaries!
The Sony Tablet is designed to ergonomically fit your hand, making it feel lighter and more comfortable while reading and watching on the move. It has a large 9.4-inch touch screen and the usual Sony high quality build.
There are now three versions of the BeBook, each to suit different tastes. BeBook One, the original 6-inch screen and now the smaller BeBook Mini, for that extra portability. The BeBook Neo comes with a new sleek design and WiFi connectivity.
Available at Amazon
Clean, Simple Reading: ibisReader gets out of your way with its intuitive, unobtrusive reading interface. Extensive support for ebook design helps your books look their best. [Non-DRM EPUB Only] www.ibisReader.com
An Android based reading app that let's you reader non-DRM EPUB books on any Google Android tablet or smartphone [Free version: Non-DRM] www.aldiko.com
Opensource reader for the desktopn and a multitude of mobile devices and phones. Also runs on Google Android phones. [Non-DRM EPUB Only] fbreader.org
AZARDI is designed as the definitive EPUB reader with built in transparency so you know your EPUBs are conforming to the specification. [Non-DRM EPUB Only] www.infogridpacific.com/