These have been verified to be working:
GT13A – expires 5/31/10
G415A – expires 5/31/10
GL14A – expires 6/30/10
These have not been verified to be working – try at your own risk:
SSD15A2 – expires 5/31/10
CALENDAR – expiration unknown
G414A – expiration unknown
BBXPUB – expiration unknown
Thanks to my reader, Alan, for sending over this nice compilation of codes to me!
Hopefully out of all the codes, you’ll get at least one to work for a free rental.