Social media case studies from H&R Block, T-Mobile, and Southern Comfort, and 14 more

These case studies (along with a bunch of career openings, new hires, and fantastic upcoming events) were featured in today’s edition of SocialMedia.org’s Big List. You can sign yourself up using our handy form on the right.

Dogfish Head Brewery Vice President of Marketing, Mariah Calagione, discusses how they were able to turn the American Red Cross’s accidental tweet into a marketing success for both companies. >> CNNMoney

Tasti D-Lite Vice President of Technology, BJ Emerson, shares how they are finding their unique target audience online and connecting with them via social media. >> SmartBlog

In her BlogWell Austin case study, Texas Instruments’ Social Web Marketing Manager, Aimee Kalnoskas, shares how they defragmented social media to drive innovation. >> Vimeo

Texas Instruments: Spinning a Social Web, presented by Aimee Kalnoskas from GasPedal on Vimeo.

eMarketer is analyzing the effectiveness of advertising on social networks and how to improve Facebook ad performance metrics. >> eMarketer

Led by Vice President of Digital Media & Integrated Solutions, Borja Perez, Telemundo is launching a social media hub called Social@Telemundo to better connect with the Hispanic presence online. >> NBC Universal

Discovery Communications’ Vice President, Social Media Communications, Gayle Weiswasser, discusses how their digital team has gained over 25 million Facebook fans by sharing compelling content and encouraging regular engagement. >> ClickZ

Jennifer Love, Senior Vice President of Communications at H&R Block, shares how they are adapting conversations online to create customer experiences and generate tons of referrals. >> Social Media Examiner

Social game Zynga is featuring a custom challenge that revolves around speed to promote T-Mobile’s campaign for the new 4G Network. >> BrandWeek

American Express is offering five free iTunes songs to their Facebook fans when purchased with an American Express Card. >> Facebook

In honor of upcoming Mardi Gras celebrations, Southern Comfort is inviting fans to check in at the French Quarter on Foursquare for a chance to win a trip to next year’s Mardi Gras. >> The New York Times

Disclosure: Texas Instruments, Aimee Kalnoskas, H&R Block, Discovery Communications, Gayle Weiswasser, and American Express are SocialMedia.org members (and awesome ones at that!), but even if they weren’t, we’d write about them anyway.