The following are Yahoo Groups which contain pix  and news of the NZ railway
scene which might be of interest to railfans:

Tranz Rail (National Freight Operator):
http://groups.yahoo.com/group/Tranzrailphotographers/

Preserved steam and heritage railways:
http://groups.yahoo.com/group/nzht-rail/

Locomotives & rosters etc:
http://groups.yahoo.com/group/newzealandlocomotives/

Chris. J