Now the developer is letting BlackBerry 10 owners sign up for a private beta of V2 which promises some huge enhancements to the original:
Social networks now connect with OAuth to make sharing easy and secure.
Share to all of these social networks
+ Facebook Pages
+ Google+ (App Activities)
Share updates from within any app with the share menu
Polarbear V2 will be coming to BlackBerry 10 on the Z10, Q10 and Q5.
Sign up to the Polarbear Beta