Amazing series of animated run and walk cycles by Felix Sputnik . (aka Michael Schlingmann )
You can download the original HD .mov file from his Vimeo page.
Animated walks and runs from Felix Sputnik on Vimeo.
A collection of animated walk and run cycles.
With a deep bow to Jamaal's Pencil Test Depot.
This one is just going to focus on Walk Cycles.
(BTW, these all tend to load and play better in CHROME or FIREFOX.)