Sebastian König show object tracking workflow and capabilities that are now in the new Blender 2.61. The new Blender 2.61 release includes the Cycles Render Engine, Motion Tracking, Dynamic Paint, the Ocean Simulator, an extended Python API, new presets for Camera Sensor size, a Adobe After Effects Exporter, and a Nuke camera animation exporter and importer. For more information on the Blender 2.61 release and all its new features, check the Blender.org site here.

This is a short demo of the basic workflow to solve the motion of a moving object into a shot with a moving camera.
For more info on this watch the tutorial on blendercookie.com
cgcookie.com/blender/2011/12/07/blender-overview-of-object-tracking-in-tomato-branch/