From the rate that these guys innovate, it's obvious they're working hard - and at the right things. I'd bet this will pay off for the investors. I have one a

From the rate that these guys innovate, it's obvious they're working hard - and at the right things. I'd bet this will pay off for the investors. I have one app on heroku, it's probably easier to use, but I have more apps on Google Appengine with jruby simply because it stays free-er for longer. I've come up against Heroku's free limits.