This is just one of those requests to avoid losing the thought - it's not a high priority at the moment.
I see there has been a good bit of thought and some discussion about various places where additional authentication would be useful/necessary/desirable. I would like to put my plug in for supporting one of the standards that allows the use of a Yubikey. I am gradually getting rid of usernames and passwords as more sites and services support the standards this device (and others) use.