I was having the echo problems as well, but I got the iBolt dock yesterday and so far the echo hasn't happened. Hopefully it will stay that way. I also was getting some audio hiss using my aux and car charger that is now gone with the iBolt.
My iBolt sends the sound through the phone speaker as well. However, since using the phone connected through the iBolt, it has eliminated the echo sound for the people I'm talking to.
I was having the echo problems as well, but I got the iBolt dock yesterday and so far the echo hasn't happened. Hopefully it will stay that way. I also was getting some audio hiss using my aux and car charger that is now gone with the iBolt.