My iPhone app (http://convoyapp.net http://convoyapp.net) uses NodeJS hosted on Heroku, I looked at various NodeJS hosting options and found Heroku the easiest

My iPhone app (http://convoyapp.net http://convoyapp.net) uses NodeJS hosted on Heroku, I looked at various NodeJS hosting options and found Heroku the easiest to get going, not being a Rails guy I've not used them before but I can see what the fuss is about now. It's been running since without a hitch, definitely recommended.