testboto.py

import configobj
from boto.gs.connection import GSConnection
import os
def main(upload = False):
        try:
                from win32com.shell import shellcon, shell
                homedir = shell.SHGetFolderPath(0, shellcon.CSIDL_APPDATA, 0, 0)

        except ImportError:
                homedir = os.path.expanduser("~")
        config = configobj.ConfigObj( os.path.join(homedir,".boto"))
        cred = config["Credentials"]
        ak, sak = cred["gs_access_key_id"], cred["gs_secret_access_key"]
        c = GSConnection(ak,sak)
        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("testboto.py","rb") as f:
                        key.set_contents_from_file(f,policy="private")

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

Cool. You actually don't have to muck around with the config directly. If you just put the "gs_access_key_id" and "gs_secret_access_key" values in the Credentials section of the ~/.boto config file you can just call:

c = GSConnection()

and it will pull the credentials out of the config file for you.

Good tip, Mitch... tks.