[timf]

  import xmlrpclib
  s = xmlrpclib.ServerProxy('http://api.pennysms.com/xmlrpc')
  s.send(key_txt, email_txt, phone_txt, "hello")

That gets me "S:M:hello" on my phone... but good enough for my purposes (server notifications, etc, backed up by a more reliable method already in place..).

Thanks!