Although HID bluetooth profile can be enabled manually (for pairing wireless keyboards), many hurdles remain before using the keyboard as previously (on the N800). Apparently, the default layout setup matches the SU8W layout. On maemo 4, you could configure the keyboard layout in the control panel, choose a generic layout and specify language locale.

See this thread for info:
http://talk.maemo.org/showthread.php?t=34872

To tell the truth, this is a show-stopper for me, so I stay with the N800 for the time being.