Hmmm I seriously doubt that saving 15 minutes a week that might take to post those weekly updates will help to give us an earlier release. I vote for continuing with the weekly updates unless there is nothing to show of course. Those who want updates every 2, 3, 4 weeks... just don't watch them weekly, and as somebody said before, just come every 14 days or so and watch whatever is posted.
Weekly updates are also useful, helping the devs know the ideas that the users may give during the development process. So, I don't see a reason to stop the weekly information.