The Dutch Pianola Association, or Nederlandse Pianola Vereniging (DPV),
does have a new web site, with forum included:

  http://www.pianolavereniging.nl/ 

No English version is available.  The e-mail address is

  info@pianolavereniging.nl.geentroep [delete ".geentroep" to reply]

Regards,
Jan Kijlstra - member of the DPV