How to capture good sound with Arduino?
Yes but you want something much faster then the Arduino, normally it is in the 96k~48k bps range.  Try this link, they make a lot of great parts and the bulk of what you have to do is control software.  You can let the chip do the grunt work (analog) and transfer thee data to where ever you want.  Some of the chips will record for 300 seconds plus.

http://www.aplusinc.com.tw/exec/product.php?lg=E&amp;mod=show&amp;cid=43&amp;pid=aPR33A3

I have used there parts they work great.

Have fun,
Gil