Clutch?

[PeterBergin at aol.com]

Hi guys.
Last week my clutch pedal started to vibrate when foot pressure is applied 
until the clutch is engaged.  It does it about 80% of the time.  The clutch 
engages smoothly and does not slip or chatter.  More recently I can hear a little 
whirling noise under the same circumstances.  I presume it is the throw out 
bearing going bad.

So my question is how long can I drive it before it strands me? 

178k miles on the original clutch.

Thanks
Pete
91 Avant