I registered as you suggested. I agree that getting productive in 10-15 minutes is great, but the setup time, at least for me, even if it takes a whole day, is a negligible overhead in my life as a programmer. Currently I run multiple servers on Amazon and as someone that programs in more than two languages, I drop an instance of whatever I am working on (Ruby, Java, Django as examples) and they really do not take much time at all. I am sure this post shows my age, but I am trying to understand the real value a service like Appfog provides.
Also may I ask how do I setup ssh trust and how do I access the command prompt.