I have the 3g. It's nice to be able to access the internet anywhere. Now, it won't give you youtube and it's slow and tedious, but I can read and delete my gmail account from anywhere, and even read SI. I can access wikipedia and other sites that are primarily text. It's useful to me for that reason.
And the display is great, I can read in any light.
I've had mine for 4 years and virtually NEVER read a paper book anymore. PS I'm a librarian, I DO borrow ebooks from my local library