I'm in the 'only if it has a hardware keyboard' camp. Funny, though - I'm actually really pleased with my N900, and if Nokia did nothing but provide security updates I'd still be pleased. Nokia are a business, and if they decide Maemo 6 will only be for new phones that would make sense. Doesn't make my Maemo 5 phone any worse, and it's open enough that the platform won't die as soon as a new OS comes out.

*ducks*