i was just at the Best Buy in Emeryville CA last night and they had 2 Kindle 3's in stock plus two demo units..and they also had ONE Sony prs-350, which I bought..
I already have the K3 (got it from amazon a week ago).
Not sure what I'll end up keeping. The K3 is very nice, but feels unbalanced in my hand for reading one handed and trying to turn pages. The Sony 350 is a dream ergonomically, I also find the Sony font a lot easier on my eyes than the K3. The K3 however has wifi and 3g and I actually think the web browser works pretty well..The Sony has no wifi or web..
The Sony DOES have a beautiful Pearl screen that looks slightly better than the K3 and it has touch screen UI which I prefer. Oh...such a tough decision..