Welcome to Geekbook --  Capturing the daily buzz in social media and online marketing & design, as well as trends, news, and cultural topics that are helping shape and inform today's readers. Send comments or ideas to jeff@dreamlocal.com. Subscribe here to receive Geekbook via e-mail.

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Today -- Ray LaHood to step down, more Super Bowl ads released early, Foursquare for Business app released, a punctuation lesson, and more Pinterest news.

• Newsfeed: Dominating the newsfeed earlier today was the announcement that Transportation Secretary Ray LaHood is stepping down from his position with the Obama administration. - Los Angeles Times

• Super Bowl Ads: More Super Bowl ads released early! See the latest from Taco Bell, Toyota, and Hyundai. - AdAge

• App News: If you use Foursquare for your business, this new app will make it easier to manage your profile and promotions on the move. - Mashable

• Toolbox: I recently learned that there should only be one space after a period. For those of us old enough to have used a typewriter, you may remember the days when we were supposed to use two spaces. What happened? Find out here - Ragan.com

• Pinterest Update: Pinterest will begin testing a redesign with a “very small” group of beta testers “over the coming weeks,” the company said today. The redesign will provide clearer navigation and more opportunities to discover new content. - SocialTimes

"My turn shall also come. I sense the spreading of a wing." - Osip Mandelstam

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Geekbook is produced by Jeff Howland, Online Media Strategist at Dream Local Digital. Tips, additions, or comments? E-mail me. Follow Jeff on Twitter and Google+.