The Ticker: Election-related Twitter accounts; Dimon in Congress; Facebook promos; Kors video; KatieCouric.com

The Guardian: US Elections 2012: Top 50 Twitter Accounts to Follow

WSJ Deal Journal blog: Advice for Jamie Dimon Before His Big Day in Congress

OnlineMediaDaily: Study: Paid, Earned Media on Facebook Boosts Purchases

WWD: Michael Kors Launching Digital Video Series

TVNewser: KatieCouric.com Gets Overhaul in Advance of Talk Show Debut