AWS Default Restrictions

I recently reached three default restrictions that Amazon enforces for EC2:

1. 20 Running instances per region: http://aws.amazon.com/contact-us/ec2-request/

2. 5 EIP allocations per region: http://aws.amazon.com/contact-us/eip_limit_request/

3. 10 Elastic load balancers per region: http://aws.amazon.com/contact-us/elb-request/

There are more restrictions but i reached these pretty quickly.
You may see the rest of the service limits at:
http://aws.amazon.com/contact-us/