Electret Mic Low Reading

For my project, I'd like to have LED's react to sound in a room, if there is conversation going on, turn them on. For this, I have purchased an electret microphone on the breakout board from sparkfun, SparkFun Electret Microphone Breakout - BOB-12758 - SparkFun Electronics
I have it connected to my arduino board with the AUD output coming in to an analog in port.

The problem is that I can not register a noticeable change without yelling from a few inches away from the mic. Because I'd like to pick up conversation, this isn't doing the trick for me.

I have since tried using an additional op-amp to boost the signal, however the behavior is only very slightly improved, even with huge gain boosts on the op-amp.

How can I make this mic more reactive? Or if it is not designed for this type of application, what mic should I get instead.

Thanks for any help!

I made an electret sound sensor that worked great. You can talk in a normal voice from across the room and it will pick it up.
The project is here:http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1263440809/0#0

I used an electret mic by itself and an opamp breakout board from sparkfun. They don’t make that breakout board anymore, but they just came out with this replacement:http://www.sparkfun.com/commerce/product_info.php?products_id=9816
I don’t know if it works as well as the old one. If I were doing another audio project I would buy that breakout and an electret mic by itself rather than using an electret breakout. The electret breakout I ordered didn’t work like I wanted it too.

Its possible you got a bad board. I would double check component values if you haven't already. It always possible the board you got has a 1/100 gain instead of 100 gain. Double check power and ground as well.

But you said you made another op amp stage that didn't really help. Have you looked at the code to make sure processing the audio correctly?