Uh-oh. What is happening? Twitter moved the tweet box, is what's happening. Out of the sidebar, where you might have had to stop and think for a decisecond. Up near the search box, where you're more likely to broadcast your search results. Right at the top of the column, where the new-tweets-are-here alert used to be. Where are the new tweets? You are the new tweets. Don't think. This design is optimized for not-thinking. Because Twitter was too careful and considered before. This will go well.