Got one recently.
Put a whole bunch of PDF books on it. A few blogs autoupdate, some books.
Very handy.

The Bookcase may just be a thing of the past. I can carry all those manuals
with me on a single device.

One advantage the Kindle (and I presume the Nook) bring to the table is the
uni-purposeness of the device: can't quickly check email, FB, Twitter, etc,
must read. For those used to doing 15 things at a time, it seems strange to
possess a device that has a single purpose in mind. I like this "feature".

3G is free. Now, to figure out how to tether it.