May come into 2 SWU's that expire at the end of this month.
I have a confirmed reservation for 2 in NC SFO-SYD in March. F cabin is currently empty.
Can I use these SWU's to confirm the upgrade today (and thus use them before they expire) and can I use the SWU on a mileage redemption - as that is what I have?

Secondly, if cannot use on a NC ticket, if I also have a purchased economy ticket to Europe, in December, can I use the SWU which expires this month to upgrade that flight?

SFO-SYD March 25,2011 (dont know how to check SWU availability)

ORD-LHR January 8, 2011

Can anyone assist me in answering these queries.
Thanks