Start using your one-click update fingers: Joomla 2.5.9 and Joomla 3.0.3 have been released.
Remember that updating Joomla is now as simple as logging in to your Joomla site and clicking on the flashing icon that notifies you of an update.
Both of these releases are regularly scheduled maintenance releases which provide bug-fixes and low-level security patches. Updating immediately is recommended.
If you have a lot of Joomla sites, consider trying Admincredible.com. This service allows you to update all your Joomla sites with one click, whether you have 2 or 200 sites.