allocate ElasticIP address as many as you can

geteip.sh

#!/bin/sh
domain=$1
wait=$2
if [ "$domain" = "" ]
then
        domain=standard
else
        domain_option="-d $domain"
fi
if [ "$wait" = "" ]
then
        wait=1
fi

while [ 1 ]
do
        ec2-allocate-address $domain_option || break
        sleep $wait
done