Facebook and Twitter Coming to Kindle–In Glorious Black and White

Amazon (AMZN) pledged to deliver its Kindle 2.5 firmware update in late May, and now that the month is nearing its end, the company is rolling it out as promised.

As a point release, it’s a nice little update, with a new password-protection feature that locks the device when it’s in sleep mode and social networking integration that allows for the sharing of book excerpts via Facebook and Twitter. But as an effort to make the Kindle more competitive with some newly arrived and formidable rivals, it falls a bit short.