Wayne Dixon is giving us many 2.5 rigs, 9 in total. 4 of them are original characters, an unofficial 2.5 remake of ManCandy, 2 characters from Big Buck Bunny and 2 camera rigs. Check the videos for more of their actions. Licenses were included in the blends.
Update: Check out Wayne's comment below for the 2.54 API changes and how to get updates.
Wayne Dixon writes:
I have created several rigs for Blender 2.5 for the community. There are 9 in total, 4 original character rigs, 2 camera rigs and I updated 3 old favourites to work in blender 2.5.
I have also created short rig demos for each rig - just showing what all the controls do and what not.
The blenderartists thread can all be found a here
These were designed to be simple model to practice animation with, mainly body mechanics.
Updated rigs to work with Blender 2.5:
I updated these rigs so they would work with Blender 2.5 AND you could still append all your old actions to the file, and also added some new features.
These should make it easier to animate the camera in a more real world way.