ArcadeFly is down now while we move from Slicehost to Heroku. It's an amazing platform, and we look forward to seeing how things run on it. My tests so far show it'll be a lot faster than Slicehost -- mainly due to my (inexperienced) rails config on that server. Heroku though, is much easier to maintain, and for a decent price (free until we grow a little more). Luckily we don't get enough traffic to warrant that yet, but 2010 is going to be a much more active year.