We're still not about say the e-book reader industry has branched out beyond the infancy stage, but one of its flagship products certainly has reason to celebrate. Amazon has announced it's hit some pretty big milestones with the Kindle. The two bullet points it's currently touting loudest is that the reader has become "the most gifted item" in the company's history -- quite an achievement given the size of the online retailer, but what's missing here is any quantitative sales data to give us even a ballpark of the number of units sold. The other big news is that on Christmas Day (we're guessing not Christmas Eve, else the press release surely would've