|Query Version of ModifyInstanceAttribute
||The Query API ModifyInstanceAttribute request does not allow the block-device-mappings to be modified and the user-data attribute cannot be modified if it already contains data.
|Paid AMIs Backed by Amazon EBS
||AMIs backed by Amazon EBS are not currently supported by Amazon DevPay.
|Windows AMI launch times
||Windows AMIs take longer to launch than Linux/UNIX instances due to larger AMI sizes and multiple reboots.
|Windows AMI sizes
||Installing software on Windows AMIs can cause them to become large and easily reach the 10 GB limit. Before bundling, check the size of the C:\ volume.
|Limitation on drive mapping
||There are limitations on devices available for storage attachment. For more information, go to How to Attach the Volume to an Instance in the Amazon Elastic Compute Cloud User Guide.
|Security group limitation
||AuthorizeSecurityGroupIngress does not allow port ranges for group grants when using the command-line tools or the Query API. This is only supported through the SOAP API.
||New users are limited to a maximum of 20 concurrent instances, but many of our customers use hundreds or thousands of instances. If you need a higher limit, go to http://www.amazon.com/gp/html-forms-controller/ec2-request.