BBM just got a little bit more Skype-like thanks to the launch of BBM Voice, which offers free voice calls over a Wi-Fi connection.

To make a voice call, BBM users simply tap the call button during any BBM conversation. The new feature is part of BBM Version 7, released last night and available from the BlackBerry Beta Zone.

BBM Voice could be a pretty potent feature for BlackBerry, with BBM still popular among younger consumers despite BlackBerry’s wider problems. Skype itself is available on BlackBerry but only for certain networks, including 3 in the UK and Verizon.