BlackBerry mentioned before that they were working on a cloud service for BES 10.1 and it looks like it will be made public soon. ZDNet learned that BlackBerry has already started launching the service. They confirmed with Pete Devenyi, BlackBerry’s SVP of Enterprise Software, that "We are making BES 10.1 available as a cloud service and have several companies in trial." In other words BlackBerry is rolling out the ability to do away with having to run a BES server at your location while still offering the benefits of one.
Devenyi went on to say that:
"This is a major initiative for us," said Devenyi. "We’re very pleased with the progress we’ve made there and the interest from our customers."
The BES hosting service should be big for BlackBerry as more companies move to hosted Exchange services in the cloud.