I have been using Cloud for my R Programming course this summer and it has worked out very well. The team has been great. On Wednesday though, there appeared to be a hiccup with my the space for my class. The screenshot included is what a number of students saw. The workaround was to select the Space, and then clicked "Projects" (refreshing it multiple times) until everything appeared.
While this has not happened prior, any ideas as to what may have caused this? Because it was a lecture, absolutely not the end of the world. I know that this is still alpha, but at the very least, I wanted to let you know in case it helps on your end.