I know that this solution is focused on being a step up from DropBox and see that the server-side security possibilities are great. But I do have to point out there are many current solutions that are concerned with the security issues of files stored on the mobile devices - especially BYOD when there are events like employee termination or lost/stolen devices. Now practical folks like us can agree that these are probably overblow concerns and not as worrisome as the current issues with laptops and even printed reports, confidential price lists, etc. that get distributed. However, there are many VCs seriously funding many companies providing solutions in this space - there are many different areas of focus/approaches for those solutions. I won't overload you with many links; but perhaps you might want to check out some of the thoughts of Ken Singer of AppCentral (http://www.appcentral.com/) who was the first one to open my eyes to the concerns of enterprise security folks.
Given that the LANSA product team will likely deliver other mobile solutions going forward and there is a strong probability that IBM i customers may build their own mobile solutions (using LANSA or other dev tools), it seems that a better answer would be for those customers to strongly consider enterprise container products/utilities like those from AppCentral, Good Technology, App47 and others - including the one that most recently has caught my interest, Nukona (I'll be testing it soon - hopefully in conjunction with LongReach).