Third party Instagram site iGrann coming to BlackBerry App World
For example, you won't be able to apply filters to your pictures at first, although that feature is being planned. Also unavailable at launch will be the ability to browse or upload videos, although both are coming in the future. As far as push notifications are concerned, sorry Charlie (or whatever your name is), that is one feature that is not being worked on.
Right now, the developer is tweaking the app via simulator and says that it will be free at launch.