Flash 10 isn't available for the N810, as of now, and others would know better than I if it will be at some point. That said, I can only think of one website I've been to that didn't work with Flash 9 (which ships with the N810). As for the websites you mention, I haven't tried them, so I can't help you there. My advice would be that unless lack of Flash 10 is a complete dealbreaker for you, don't let it influence your buying decision too much. I'm quite happy with my N810, and it hasn't been much of an issue.