imho Amazon is leaving Apple’s e-reader behind, in terms of substantive e-reader client and service innovation. See the full review for more details, and this Cringely post for some interesting speculation about Apple’s ultimate aspirations to become the leading digital-stuff retailer. Maybe Apple should simply acquire Amazon, before AAPL’s current bubble bursts.
The 2.5 firmware helps the Kindle 2 and DX stay relevant in the face of increasing competition from the likes of the Nook and the iPad. (Sorry Kindle 1 users—it looks like you won't be able to upgrade to 2.5.) None of the features are mindblowing on their own, but collectively, they make a pretty hefty update that addresses some of the complaints that Kindle users have expressed in the past. If Amazon eventually adds some of the additional social features that we want, it would make staying on the Kindle platform even more appealing.