It would be great to allow BA to interface to online storage.
I've asked about this in the past (viewtopic.php?f=3&t=3287&p=10066&hilit=cloud#p10066) using rsync. As things have progressed I now see this as a somewhat clunky approach not suitable in the long term.
I'd prefer direct support for something like Amazon S3 (or any of the other major players) with a billing/management portal, similar to the Cloudberry products.
Being a solution provider it seems my future is all about selling reoccurring revenue and I will have to choose my product portfolio according. This has been rammed home recently with the inevitable news that MS is pulling SBS from it's server 2012 line-up; the staple many many small solution providers. Since BA is a product that seems to occupy this space it would also seem inevitable that licensing for the Exchange plug-in will shrink accordingly so a cloud storage plugi-in may be one way to plug the gap.