Automattic announced a liveblogging plugin for WordPress last year. It’s a free plugin to download and install for those users with a self-hosted version of WordPress. Those folks that are on WordPress.com can get this service through WordPress.com VIP and the cost begins at $500/mo.
Recently, Steph Yu announced the release of some updates to this plugin.
As another huge feature, the plugin now sports the ability to “archive liveblog posts” — which is a huge help.
Overall, I’m really happy with this plugin and I think they’re doing a great job developing it.
Here’s a video demoing the plugin: