From official Unity I received this newsletter: Unity Cloud Build on the horizon.
Our major announcement at Unite 2014 was something that has the potential to take a massive weight off the shoulders of anyone making games. Automating build generation and putting it in the Cloud can free up a whole ton of resources – making it faster and easier to generate builds and share them with your team.
Unity Cloud Build automatically monitors your project's source control repository (with support for Git, Subversion and Perforce) and creates new builds for you – currently on iOS, Android, and the Unity Web Player. Unity Cloud build is currently in closed beta, and we'll be sure to let you know when it's ready. It'll be available on a subscription-based model with a free tier.