I used appengine for my now defunct http://www.unedditreddit.com http://www.unedditreddit.com project, which sucked up all reddit comments for a few months. It

I used appengine for my now defunct http://www.unedditreddit.com http://www.unedditreddit.com project, which sucked up all reddit comments for a few months. It was extremely easy to use and seemed to preform just fine, with the exception of those few weeks where the datastore had stability problems.