Amazon EC2 Spot instances are now available in the Asia Pacific (Seoul) region. AWS customers in the area can now use Spot instances to save up to 90% compared to On-Demand prices by bidding on unused Amazon EC2 capacity. In addition to reducing the cost of running your applications, you can also use Spot instances to increase your computing scale and throughput for the same budget and enable novel types of cloud computing applications.
Source: amazon.com