Hey Anatoly I'm a Mac user and don't have a Windows laptop nor Windows anywhere. I'm aware of sideloading via Google Chrome and via playbook tools. However consider me a jumpy when it comes to that. I sincerely hope that BA develops a native app that just works. For a business tool such as a BlackBerry it'd make things even more attractive.
I'll probably end up sending BA another tweet and see what their response might be. Hopefully they realise the potential of an native app. So far collecting a boarding pass is a bit cumbersome and wastes paper. I just want my electronic boarding pass back.