craftgrrl | candles and coffee beans

thanks to everyone that gave ideas for what to do with my millions of crayons.. user with the cunt icon, im still looking into the yellow-orange crayons for you..
now onward to some more candle questions..
if i threw in some whole beaned coffee beans into the wax (as an outer decoration for the candle) what would happen if they burned? good or bad smell? or if i used ground up beans, what kind of results would that bring upon?
anyone know of anything that i can do that would cause a positive reaction regarding soap and coffee beans (whole or ground up)?
once more, thanks for any input.