opensocial.Activity.Field.TITLE_ID usage and Shindig

[Brandon Peters]

Hello,
I'm writing an Opensocial 0.8 app and I'm to the point now where I'm
trying to implement activity streams. This all seems to be going well,
and my activity streams get sent to the container, but I'm running
into a problem with the TITLE_ID activity field. From reading the
documentation, it seems to me that the TITLE_ID field is the name of a
<msg> element which I could use for substitution instead of specifying
a TITLE field, however, when I try creating an activity using the
TITLE_ID, the text never gets substituted. I'm not sure if it is a
problem with Shindig, or if I'm misunderstanding the purpose of
TITLE_ID, or that I'm simplying doing something wrong. I'm using
inline message bundles if that matters. Here is the section of my code
that applies to this:


<Locale>
    <messagebundle>
        <msg name="ADD_BOOKMARK">
            ${Owner} has bookmarked an article.
        </msg>
    </messagebundle>
</Locale>

....

var template_params = {
    'Owner': owner
};

var params = {};
params[opensocial.Activity.Field.TITLE_ID] = 'ADD_BOOKMARK';
params[opensocial.Activity.Field.TEMPLATE_PARAMS] = template_params;

var activity = opensocial.newActivity(params);
opensocial.requestCreateActivity(activity,
opensocial.CreateActivityPriority.HIGH, function() {});

Any ideas?
Thanks,
Brandon

-- 
Brandon Peters