On 9 Jul 2006 20:55:23 -0700, "Dan" wrote in
.com::

Obviously, I am not going to be able to talk directly to a controller,
but I am thinking I should at least be able to reach overflying
aircraft...

That's my emergency plan too.

Do airliners or other aircraft routinely monitor 121.5?

Just get the local center frequencies from a Low Level chart, and
start making mayday calls.