I just started playing with Jajah today. I called Manila and talked for 5--10 minutes. Call quality was ok, no echos, but there were delays in hearing myself talk.

I made the connection from the URL. I installed the BB app afterwards, and will try that out later today.

Based on limited data on Jajah, Skype has better call quality, but using my own phone instead of the skpye headset makes up for it.