I really like this concept. I wonder if it works without a carrier plan. In other words, get a supported BB for full price and you are good to go for UNLIMITED VOWIFi as long as you can have access to WIFI.
Originally posted on Gigaom:
Research In Motion(s rimm) took the final wraps off of a software update for BlackBerry Messenger 7 on Monday, adding voice calls over Wi-Fi to the popular messaging service. The calling feature was previously announced while in beta testing, but becomes available to the general public today in the BlackBerry App World store.
The new feature should be especially useful in areas with high wireless network concentration and in regions where voice calling minutes are still expensive. While handy in the U.S., for example, voice over Wi-Fi is likely to appeal in areas where the BlackBerry brand is still strong: Emerging markets that don’t yet have cheap voice minutes over cellular or are limited by cellular network coverage.
A video demonstration made by Research In Motion illustrates the seamless experience of starting a voice call from a message thread. One button tap initiates the call, keeping the message stream open for IMs or photo sharing.