list_instances.py

#!/usr/bin/env python

from boto.ec2.connection import EC2Connection
from boto.regioninfo import RegionInfo

host = "svc.uc.futuregrid.org"

region = RegionInfo(name="Nimbus", endpoint=host)
conn = EC2Connection(region=region, port=8444, validate_certs=False)

rs = conn.get_all_instances()
for r in rs:
    for instance in r.instances:
        print instance
        print instance.instance_type
        print instance.public_dns_name