In their pricing they list iis/sql server only possible under large instances: http://aws.amazon.com/windows/ which costs upwards of $800 per month.
However several how-to blog posts show using AMIs with IIS/SQL server with small instances (which presumably costs about 80 dollars a month).
http://articles.sitepoint.com/article/wordpress-in-the-cloud-with-ec2-and-wpi
I wonder if this has licensing issues. Does any one know if this is legit (i.e. doesn't break TOS) and if so, is the pricing the same for IIS/SQL vs. normal windows small instances? (I ask because they have seperate pricing for larger instances.)