I've seen a few questions about 'staff standby' tickets - where you get a cheap ticket with 'low priority' - eg, if there's an empty seat, you can fly. I call it "staff standby" because the questions I've seen so far seem to suggest that this is becoming less available to the public, but is still sometimes available to select groups (airline staff, etc). It also seems like the answer might vary dependent on region.
So, currently (mid-2013) in the SEA region, can one still buy low price 'standby-priority'/'space-available' tickets?
(If it doesn't broaden the scope unacceptably, then as a follow-up: What similar possibilities exist, currently in this region? (Last-minute non-stanby bookings, dramatically cheaper off-peak/red-eye rates, etc.))
Edit: some related recent questions (which got me thinking about this):
Are there any secrets or tricks to flying for free (or almost free)?
Is it possible to travel on cargo airplanes?
Flying stand by from US to Europe -- is it still worth it, and if so, how to do it?