Tried the V626 code online a couple of days ago, no cigar (as others have found).

Gave up and went to the station to get a ticket at the full price. Surprisingly, it was found that V626 DOES work when buying a ticket at the Quik-Trak machine. This was in NY Penn station for a ticket to Boston.

I guess the station Quik-Trak machines havn't caught on to the website update yet....

Hope this helps -

ZB

PS: V166 also seems to work and give 10% off for the BOS-NYC-NJ sector.