Thanks for your suggestion! The Pinside forum software was based on bbpress and then completely customized (I mean, really really hacked) to integrate into the Pinside.
There are several reasons why I'm not planning to integrate with Tapatalk. First and foremost, it would take things out of my control, and in the hands of a third-party (commercial) app - I don't like that idea. Second the app itself is not free for users. Third, Tapatalk is not free for us (the Pinside) to integrate (yeah there is a free version but it "monetizes" links, I don't call that free). Fourth, I would have to implement a plugin which I'm sure won't work out of the box because we messed about with the bbpress software so much. Fifth: It would not give the whole Pinside experience (which is showing your location, karma, heart, collection, ratings count etc. - something I've worked on very hard to accomplish, integrating the whole site into one).
I totally understand the need for a nice smartphone app to streamline reading and posting on the Pinside but it will have to be custom built by ourselves. Hopefully I'll be able to create something in the nearby future, but it would probably be a mobile version of the site, not an app (too much platforms to support )