Notifications for Joomla extension updates

Question

Is there an extension that would check whether there are newer versions available to the installed extensions on a Joomla site, and would notify the site administrator?

Ideally, I am looking for something similar to Drupal's "Update" module.

I understand that there is no central place for keeping all these modules and their versions for Joomla, but at least a lot of them are available on the Joomla Extensions site, along with the needed information, so perhaps somebody wrote a tool that checks that source?

Answer 1

Aha, looks like this is to be included in Joomla 1.6, according to this description (check out the "Find Updates" button, looks great).

Answer 2

But if you are using Joomla 1.5 until 1.6 is stable check out: http://extensions.joomla.org/extensions/core-enhancements/installers/9332

Excellent for keeping components up to date :)