Buzzing Fuel Pump- Time?

[Kerry Griffith]

Gents,

My apologies if I neglected to do a decent search in the archives. . .

I just noticed a fairly loud buzzing from the fuel pump today, and 
while I realize it's the death knell, I wonder if folks have experience 
with how long the pump tends to last after it begins to howl?

I'm going to have it replaced ASAP, but I need to drive it a bit first- 
I hope. If you tell me it's as likely to die tomorrow as it is in a 
week, I'll make other arrangements.

TIA,
Kerry