As luck would have it, the day after Shannon left for a business trip Libby took her first un-aided steps. I was waiting to post this video until she returned because I didn't want her to feel like she was missing out:
I would say that Libby's walking abilities continue to be at the same level as a drunken peg-legged sailor in a dark room. No doubt she will continue to improve, though currently Libby does not really want to walk since crawling is still much faster.
(I am sorry that the video is stretched - for some reason google didn't like the format of this video and youtube doesn't allow portrait videos)