I'm using the Blog Headlines tool to pull in an RSS feed from another source. Why aren't the latest headlines showing up on my site?

We are utilizing an RSS feed system from Google to pull in external RSS feeds (from another site). This is a great system, however there is a time-delay built-in (for performance reasons) before new posts are included in the feed. The delay is approximately 30 to 60 minutes. So any new posts will not show up immediately on your website, but they should show within about an hour after they're posted to the external RSS source.

Also, this only applies to external RSS feeds, not your own blog. Posts made to your Rocketship blog will show up in the headlines on your website immediately.