Heroku actually published a really good blog post about this today.. it was on the frontpage earlier: http://blog.heroku.com/archives/2010/7/20/nosql/ http://b

Heroku actually published a really good blog post about this today.. it was on the frontpage earlier: http://blog.heroku.com/archives/2010/7/20/nosql/ http://blog.heroku.com/archives/2010/7/20/nosql/ Riak's nice for redundancy and high availability stuff, and scales dynamically by adding instances.