I have had mine for a month now, and have done one overseas trip with it.
The connectivity is fabulous - I have subscribed to the Daily Telegraph and the Economist, and they just arrive every morning, even when I was in the USA. I like being able to download sample chapters to check if I like the book, and again, can just order them up from the Kindle if I want to read the whole book.
Some of the free books are very badly formatted (complete works of Jane Austen with no way of navigating between books, anyone?), and even the periodicals are very variable - you don't get photos or pictures with the Telegraph or the Spectator, for example, but then they are very cheap. The Economist charges a lot more, but has done a decent job of the file conversions so you get a much clearer read out of it.
I have also found that Baen will sell you e-books direct in a Kindle format, even though they are not available through Amazon - some are free, and all of them can just be e-mailed to you through your Kindle e-mail address. That is fabulous!
Only thing I do find is that I miss the change of weight and pace and font you get when swittching from magazine to newspaper to book to book.
I am just off again, to Asia this time, and am looking forward with some interest to see if all the comms tech works as well there. I have plenty to read downloaded aleady!