In their new Fall catalog they have a Voice Direct speech
recognition kit. Can learn upto 15 words. When one recognized a
coresponding output pin goes high for 1 second.
Module,speaker,microphone,resitors,pushbuttons $49.95
4.5-5VDC
Also the 11/99 issue of Electronics Now has a PIC based seismic
detector using the geophone sensor they carry.