Like Motion sites, Make A Face is a community based site: when viewers join it, it shows up in the “Communities” list in the sidebar of the member's profile. (You can see it on mine here.) The photos posted to the site are also stored in a group, not in a blog.
Unlike Motion, Make A Face uses a Flash based photo uploader to take a picture from your computer's webcam. As you can only post photos, Make A Face can use the gridded view instead of the stream of posts view as on a regular blog or community blog. If you're interested in seeing more about Make A Face, it's on GitHub (and so is the Flash webcam widget).
Of all the sites we've made to reference our nifty TypePad APIs, Make-a-Face is, by far, my favorite. Where else can you find memorable, meaningful content as simple as a candid photo? This is also why people love Polaroids so much: they provide the visual that surfaces your memory of a particular moment along with all the layers of where you were when the photo was taken, what time of day, who you were with, why you decided it would be a good idea to remember it, and so on.
The thing that I REALLY like about Make-a-Face is the meta-trends that will crop up organically. Remember that this site offers no post data beyond the photo, so it's a fun exercise to the user to find the commonality between photos, just like these: