Amazon launched SAAS application store over ec2

Now in AWS there is a marketplace, where with one click you can launch an application that will spin on ec2 instance.
You can run mongo, SAP, RHEL, zend server and more.
Some of the software runs for free and only ec2 charges are taken (for example, mongodb), some apparently provide support and run with pay per month support and sometimes even pay for hours of running software (for example, running NGinX 0.8 Stack with Production Support costs $ 149 per month ).
Pruflink
aws.amazon.com/marketplace/ref=pe_12300_23536850_mkt_eml_lnch