So while we were in LA, we noticed that Charlie was starting to want to stand up a little and he was definitely getting a lot better at holding his head up, so when we got back we stuck him in the Jumperoo and watched him go. He's still figuring it out a bit and can't completely support all of his weight for too long, but he really enjoys it. You can see the video below (or on Facebook).
Here's a video of him standing (Facebook).
And here's a video of him showing off his dance moves without my help (Facebook).