According to the most recent number of the POLA CB Club member circulation the POLA Christmas Net 2008 shall be held from Friday evening the 12th to Sunday evening the 14th of December 2008. Unfortunately the announcement lacks the accurate commencing and closure times and channel(s) used for this net activity. At least in 2007 the net was active on channels 15, 26 and later on 33 due to heavy QRM. I think there will be further announcements on their Website at URL
http://personal.inet.fi/kerho/pola/uutiset.htm
Hopefully good propagation conditions do exist at that time on CB.
Update: The activity shall take place with ordinary voice net on channels 15 and 33 FM as well as a packet radio net on channel 24 FM