I like my nook, but I think if I were just getting into the whole ebook thing now, I would choose the kindle. (blog.the-ebook-reader.com)
If you want to go beyond the whole ebook thing, it's worth taking a look. (indiereader.com)
It's nice to have a dedicated ebook thing, instead of a multipurpose heavy device like an iPad (which I also enjoy, though for different reasons). (4thletter.net)