The tags turn into a tag cloud at the bottom if your screen/window is small enough (I had to zoom out to get them to move to the right on my dinky x60). Smalle

The tags turn into a tag cloud at the bottom if your screen/window is small enough (I had to zoom out to get them to move to the right on my dinky x60). Smaller still, and everything (including the social share buttons) turns into one column.