These are the AMI-IDs of the XLT 4.0.5 images for Amazon-EC2.

• EU-West: ami-772b1d03
• US-East: ami-52649b3b
• US-West: ami-29bfec6c

Images can be used free of charge. The EU image is brand new and features Ubuntu 11.04. It has also a smaller disk of only 8GB compared to 15GB before. This helps to make it eligible for a free tier micro instance. Of course this instance type is not recommended for load testing, but you can easily test deployment and remote execution of XLT before you move up to more expensive setups.