[AG-TECH] echo-cancellation on the cheap?

[Randy Groves]

I'm looking at the prices for setting up some nodes, and in this economic 
climate, the $3000+ price for the Gentner sticks out like a sore thumb, 
when you consider that it might be feasible in the near future to put all 
of this stuff on one reasonably priced box.

ASPI, now part of Polycom, is one alternative, but that's still $1800.

Has anybody found a cheaper alternative?  A card for a PC?  An 
echo-cancelling microphone?

-randy