As the world knows, Facebook is planning to unveil another redesign this week. We were able to preview what users will see on their home pages at our offices last week, courtesy of Facebook, and of course we plugged into the live blogging of its news briefing. Though the early reviews are mixed, to us the changes seem pretty simple, and timely. The newsfeed will take front and center, it will be updated in real time, and the 5000-friend limit will go away. Sound like a Twitter-killer? It’s probably more likely that the redesign will hurt FriendFeed, but the Twitter influence is clear. Twitter is how users engage with celebrities and large companies, and Facebook apparently wants a big piece of that action. If you can’t buy it, why not build it?