I just got my brand new iPad 2 and am loving checking out all the cool apps that are making my life better! My most recent free find is Talk a Tone.
This is a great utility for utilizing you free Google voice! It is super easy to use where you just input your Google voice info. Then you can both make and receive calls! Your a given different compression choices and the sound is pretty good. Depending on your connection there may be just a little lag buy I haven’t found it to be a problem at all.
So go, talk and enjoy! All for free!