Keeping this thread updated - version 0.6.1-BETA has just been released with a number of improvements http://cloudnimbus.org. If you've used Nimbus please leave your feedback here!
Another great update for Nimbus has just been released! 0.6.2-BETA is now available at https://cloudnimbus.org, now with a file synchronization app for Windows and automated SSL encryption from Let's Encrypt!