We now have working Facebook and Twitter plugins -- each has their own page embedding large activity feeds, and the Twitter one also appears down the left side of the News page.

I had to do quite a lot of hacking to make these injected blocks of content behave themselves. They tend to have position: absolute set everywhere, so you have to override that otherwise the scrolling doesn't work properly; they scroll above our top banner rather than behind it. My Firefox sensibly does not display any of this content (it's created by injecting JS from Facebook and Twitter, which executes in the context of our pages, of course, so I would expect my security settings to prevent it). Other people's Firefoxes seem to show it, though, and it works on my other browsers.

Also fixed a couple of other things such as image sizing and schema issues for TL.