I think this will be good for e-books in general, as it will demonstrate to the general public that yet another heavy hitter in the book world thinks they're a good idea. Amazon has a lot of weight to throw around, so they can potentially knock a lot of publishers off the fence on the matter.
I think the biggest potential to negatively impact the Sony Reader is if mobi were to become the de-facto standard for e-books. If that happens, then all Sony would really have to do is support mobi format on their devices.
The impression I have is the same as Bob Russell on the matter: Amazon isn't interested in talking about that presently, or more accurately the impression I get is that Amazon isn't real interested in discussing mobi support as anything other than a
sole option on a dedicated reading device. If that is the case, and they stick to it, I s'pose that as a last resort Sony could convert to sole mobi support and convert their existing holdings to mobi format for their ConnStore customers to re-download.
But I wouldn't look for that to happen unless mobi pretty much squeezes all the other formats totally out, and still won't entertain cohabitation with support of other formats, and I wouldn't expect it for quite some time in the future, if at all.
