Let's just say that I don't want to see Nokia abandon a new device again. Probably won't happen but I'd rather not place my money (and faith) in them.
Besides, I used my n900 enough and I wanted a change and I like android. The only thing that bugs me is the multitasking 'cause I really MISS the tabs view in maemo.
Maybe in a year or two I'll try meego or maybe not if android keeps improving.