Yea just echoing pennywise's experience

It works if I:
1) set controller to slot 2 (first option in accessory settings)
2) register bluemaemo

but after restarting bluemaemo I can't reconnect. Actually remember having the more or less same problem with the PS3 and the N810. I guess the PS3 is just not fun to connect with.

One thing to add: the 'start' button doesn't appear to work even when the other buttons do. Obviously kind of academic when reconnecting is impossible, just thought I'd mention it.