testboto2.py

from boto.gs.connection import GSConnection
def main(upload = False):
        c = GSConnection()
        for bucket in c.get_all_buckets():
                print "Bucket ... ", bucket.name
                for key in bucket.get_all_keys():
                        print key.name
        if upload:
                key = bucket.new_key("testboto.py")
                with open("testboto2.py","rb") as f:
                        key.set_contents_from_file(f,policy="private")

if __name__ == "__main__":
        main(True)
        main()

This is a shorter version as a result of the tip from Mitch Garnaat