just thinking about it. the N9 is basicly improved hardware with the same os, the core of maemo 5 is there, so i can imagine an overclocked n900 at 1ghz will compare to the n9, obviously this isn't fully accurate but it is a good indication of what the performance will be like. going by what has been seen with multi-tasking i'm impressed. i can only imagine how smooth it would be with a few hundred mhz added on top.