From Weblog Tools Collection comes this late breaking item.

Chris Johnston has announced the availability of a public WordPress 2.5 demo site. This site will house the most up to date version of WordPress 2.5 prior to its release in March. This is particularly useful to those who do not wish to setup an SVN install of WordPress on their local machine or web server.

The blog does get wiped out and re-instated every hour.
2.5主要是更换了后台管理的设计，包括面板的风格和对侧边栏的管理。所有内置侧边栏都可以增加无限多个。另外还增加了一个简单的Tags管理。