IOS/Android application for interacting with processes
There could exist a good interface for interacting with BizAgi using mobile devices.
See what podio.com did about this. They have understood what is the difference between different devices and gave a great experience to the users.
The user could be notified by push when a new activity arises to him. Attachments could be taken from the device's camera etc.
From what I saw from BizAgi's API, this task could not be that hard to implement. You need a good Interface Designer for a good user experience. If the user experience is not the focus, it's better not even try.