While majority of the BlackBerry products out there do not use the targeted software, what remains vulnerable to the Heartbleed bug would include the likes of Secure Work Space corporate email, BBM for iOS and BBM for Android. BlackBerry Senior Vice President Scott Totzke did mention that hackers are able to use a Wi-Fi connection or over a carrier network to break into those apps, but the risk of an attack remained small and would need to be carried out within a narrow window of opportunity.
Better to err on the side of caution, BlackBerry has plans to roll out security patches for both BBM apps on the iOS and Android platforms, although they have yet to reveal just when these updates would be sent out exactly. I guess we will just have to sit tight and wait in this case.