It's very weird that they don't even mention MeeGo there imo. Nokia have been long time partner with Adobe and haven been strong with flash for long time. That all will change in a one month thought. When it comes to Maemo 5 that was what the talks have been telling lately from Adobe. Nothing is certain yet thought.

Flash runs great on overclocked N900, but that's not excuse not to get Flash 10.1.
I'm big fan of Harmattan and Harmattan was the reason i joined this community, not fremantel. I would honestly think of getting Android phone with 2.2 rather than Harmattan if flash is not coming there.