Allows you to easily upgrade to Beta releases.
This plugin provides an easy way to get involved with Beta testing WordPress.
Once installed it will enable you to upgrade your blog to the latest Beta or Release candidate at the click of a button using the built in upgrader.
By default once enabled it switches your blog onto the point release development track.
For the more adventurous there is the option to switch to the bleeding edge of development.
Don't forget to backup before you start!