While I am pretty sure the big picture reason why cell phone carries do not want to allow voip calls over WiFi.

Will the average user forget they are on WiFi when making a call and drop the call when they are mobile and get out of range of the WiFi?

So I am checking out app brain for the second time. What drew me back is the ability to find what you like from your desktop and have it install on the phone automatically. Go try it out and let me know what you think.