AWS EC2 announced that release Elastic IP which includes Static IP support and more !!

Wow!!

Feature Guide: Amazon EC2 Elastic IP Addresses

Amazon announced about Elastic IP. This solution is included static IP support and more. Many developers who use EC2 may become happy! The Elastic IP is associated with our account, not a paticular account, and Amazon EC2 enables us to engineer around problems with our instance or software by programmatically remapping your Elastic IP address to a replacement instance.

For details, see Feature Guide: Amazon EC2 Elastic IP Addresses.

Thanks AWS team!