Should Amazon have pre-announced they had a larger screen Kindle coming when they announced the Kindle 2 (which was a major product upgrade)? As a Kindle 2 owner, I'm a bit upset because I would have preferred to have a choice. The product announcements came only 3 months apart. I saw one video report on Engadget referring to "Kindle 2 anger".
IMHO, I think Amazon really screwed over it's Kindle 2 buyers. It gave them the impression that this was a major new product upgrade and encouraged them to buy it in February - when they most have known/had in the pipeline the DX for June.
There's always new stuff coming from tech companies and you buy the latest gadget at your own risk, but this is a bit on the edge of what I think is reasonable.
I'd like to see Amazon offer Kindle 2 owners a DX exchange program of some kind.