I think what we're going to see instead is either of two things: a) Nokia officially supports N900 with Maemo 6 or... b) The community makes it's own version of Maemo 6 that does work on the N900, much like it has previously done with the "hacker edition" versions of OS2007 and OS2008 for the 770. Honestly, I don't think N900 owners will have much to worry about. I'm sure they will be able to use Maemo 6 one way or another.