Embedded Newbie has compiled a list of Arduino DAC solutions.

I was in a need of an analog output output for my Arduino, and I found quite many different digital-to-analog converter (DAC) solutions by googling around. So finally I decided to gather them on one page as a reminder for myself and a guide for others. So here it comes!

As mentioned, if you need to add some sound to your next project the Wave Shield can be picked up at the Adafruit Industries store.