I got a Kindle for my birthday. Thanks to Camilla for the actual object, and various people for helping me decide I wanted one - Sean, Tridge, Sophia, Simon, Liz, etc. I opted for the new Kindle, sans keyboard, as I can't envisage using such a dinky keyboard for anything serious and the 3G might have been nice for emergency use but again not a replacement for a real computer or even a smartphone.
Having now used the Kindle on a six week trip, including a week in Thailand, I am enamoured of it for travelling. For a long plane flight and a holiday in a non-English-speaking country, I'd once have carried six or more books and had to rely on some luck finding new books while travelling. With the Kindle, this is simply not a concern. (Though I did always carry one printed book with me, just in case the Kindle stopped working or was stolen.)
My Kindle is kept slaved to the Calibre library on my desktop, with the "Kindle Collections" plugin so I can keep documents in collections. I have registered the Kindle, but using a brand new Amazon account with no payment information attached to it, so if I need to I can email documents to it but I know I'm never going to get any bills for doing that. That's also a barrier against any temptation to buy Kindle items.
I have over a hundred books on the device already. Most of those are novels and other classics downloaded from ebooks@Adelaide (one of many such repositories). I've also started getting review copies from publishers in PDF and ebook format - not as much fun as getting boks in the post, but some small publishers have baulked at postage in the past. And if I own print copies of titles (in the 60 boxes under my mother's house) I don't feel bad about torrenting de-DRMed copies of them.
Comments on having the smaller Kindle:
* I don't really miss the keyboard - once I got my 128 bit WPA2 wireless key onto the device!
* the battery life is fine, even travelling to Australia and back.
My biggest beef is a simple problem with the user interface: the Kindle remembers where you're up to for each book, but doesn't remember the device orientation. I read most ebooks in portrait mode, since that's how the device was designed to be used. But PDFs are mostly too small to read with that orientation (where the Kindle has "fit to page" as an option but not "fit to width"), so I read them in landscape mode (where the Kindle does "fit to width"). But I have to manually switch orientations everytime I move from a PDF book to a mobi one.
In that vein, multi-column PDFs really don't work well at all. I've tried a few scientific papers and it's just too painful.
Just in case anyone's worried, I've bought a pile of print books since acquiring the Kindle.