Probably not the first place you might think to visit to get ereader reviews, but they are having a Digital Reader Review week and if you don't find it informative you might at least find it entertaining. SBTB has it's own unique style.
This location has links to all the review posts plus older posts related to ereaders, but if you want to go to the individual posts I've included the separate links below.
http://www.smartbitchestrashybooks.c...ader-olympics/
Sony 650
http://www.smartbitchestrashybooks.c...touch-prs-650/
Kindle 3
http://www.smartbitchestrashybooks.c...he-kindle-iii/
Nook
http://www.smartbitchestrashybooks.c...k-the-bn-nook/
Bookeen Cybook Opus
http://www.smartbitchestrashybooks.c...us-by-kathlyn/
I think there will be a Kobo review forthcoming.