TypePad Antispam has been launched. The free plugin for TypePad, Moveable Type and WordPress users aims to help in the fight against the continuing scourage of comment spam.

Essentially a spam filtering service that combines several adaptive learning engines to scour inbound comments, trackbacks and pingbacks (determining whether they are wanted or not), TypePad AntiSpam's filters learn from user reports, enabling the plugin to adapt quickly to new attacks.

While the solution is already included in TypePad accounts, bloggers using MoveAble Type and WordPress will need to request an API key, download the plugin and install and configure it for their system specifically.