I never know how to answer this one. Are we looking for proficient, or amateur walking? He's taken more than a few steps, but it's definitely not his transportation mode of choice. He also has this great ape walk, where he will walk on his feet, and use his hands. It's got to be great exercise!
He was standing on one foot on top of my mom's ceramic sandicast yellow lab figurine to look out the window. He climbs on everything!