In this edition of the Weekly Wrapup - our newsletter summarizing the top stories of the week - we analyze a new breed of content site that is rapidly gaining momentum, look into recent statistics showing that Gen Y is using Twitter more, compare five recommendation services for iPhone apps, review the new-look MSN, and more. We also check in on our two main channels: ReadWriteEnterprise (devoted to 'enterprise 2.0' trends and products) and ReadWriteStart (dedicated to profiling startups and ent