Microsoft have opened the registration for the latest beta for the next Xbox 360 update. To sign up you need to click on the tile that should have appeared on your Xbox 360 dashboard. The update is said to bring some performance increases as well as bug fixes. The other feature included is the ability to purchase online content in your local currency. This is due to the removal of Microsoft points later this year.
The spots for the beta program are limited, so if you plan on signing up for it, you best do so quickly. More spots may become available at a later date.