When Amazon's Kindle hit the streets last November, the critics gave the newfangled ebook reader mixed reviews. The customers, however, have been saying something a little bit different. Sales have been brisk, a bit too brisk actually. Waiting up to six weeks to get the Kindle, customers have been getting huffy, and last week Amazon's CEO, Jeff Bezos, had to post an apology on Amazon's homepage. If you're wondering what makes the $399 Kindle so sought after, Lifehacker's review does a good job of summing up its virtues. In the meantime, if you want to get your hands on one, get in line.