Seems like just yesterday I had this same problem with Play! v1. After trying everything I could think of, I am out of ideas as to what could cause Play! to just hang on the [info] play - Application started (Dev)
Here's a screenshot of what's persisting:
And that's the story of my life. Does anyone know of a bug with v2 or have any ideas?
Update: Discovered this is only occuring in Dev mode...but that's still important ;)
I found the problem, and it's a possible bug.
Discovered that the app hangs on the screen above when the server process file isn't cleaned up. So to get past this (for my particular case) you need to go to the root of your app and delete RUNNING_PID
file.