title: MongoDB on EC2 server or AWS SimpleDB?
body: <p>What scenario makes more sense - host several EC2 instances with MongoDB installed, or much rather use the Amazon SimpleDB webservice?</p>
  
  <p>When having several EC2 instances with MongoDB I have the problem of setting the instance up by myself.</p>
  
  <p>When using SimpleDB I have the problem of locking me into Amazons data structure right?</p>
  
  <p>What differences are there development-wise? Shouldn't I be able to just switch the DAO of my service layers, to either write to MongoDB or AWS SimpleDB?</p>