If your tickets are issued, you can make an "involuntary rerouting" to the EWR connection with seating in same service class. For ex. if booked in W-class and only V-class is open via EWR it is no problem. No additional fee for you.
Travellink.dk can rebook but I think a SAS Office need to reissue the tickets.
If your agent won´t help you - call SAS reservations for assistance.

SAS Salesinfo for travelagents shows:
Flight cancellations to/from USA and Asia due to installation of flat beds
Introduction
Due to installation of new flat beds in Business Class of the A340 fleet, it has become necessary to cancel a number of flights to/from the United States and Asia. The affected flights were removed from reservation systems on 01SEP06.

Rebookings
Passengers will be rebooked to other SAS flights whenever possible. Schedule change messages will be forwarded in PNR:s to responsible offices.

Refund
Permitted

Period
06JAN07 - 21MAR07

Affected flights
SK943 SK944 - CPH-CHI v.v.
SK983 SK984 - CPH-NRT v.v.
SK997 SK998 - CPH-PVG v.v.