And something else which most people aren't really aware of. If in CA you hit "Statistics", there's some info in there regarding the feed. If you've added a new template to an existing repository and it hasn't showed up within ~2 hours (you can see the last time the feed ran on that screen), you'll see why it's not appearing by clicking on either the Template Errors link, or the Invalid Templates link. The former lists all the errors (and pet peeves) found on the templates, some of which CA considers to be fatal, and the Invalid Templates are ones where a syntax error in the XML prevent parsing it.
On a new repository being added, I'll reply to the PM either with questions / suggestions / fixes required or let you know that it's in there. My goal is to get new repositories added within a couple of hours of receiving the PM.