I currently use Soundcloud to share rough mixes with my clients. It works great but I am not a fan of Soundcloud and their commercials, and horrible user interface.
Presonus could create a "Spherecloud" which could integrate with SO5 and add that feature to the Spherelite subscription for 5.00/month (no software licenses included)
I believe providing a subscription service like this would fill a need for many musicians!
Thanks for being a great company Presonus!!!