If you’re looking to pitch in to the relief effort for Chile after this morning’s massive earthquake, we’ve gathered some of the web’s best channels for humanitarian aid and reconstruction efforts. While the death toll is not expected to grow anywhere near the numbers of the Haiti quake, Chile will still require support for the many who are now homeless, and funds for the rebuilding of infrastructure. If you have the means, we encourage you to donate through one of the channels below.

A woman was able to track down her missing sister-in-law today thanks to the help of a fellow Twitter user.

A new policy released today by the Pentagon has reversed multiple bans on social media websites and tools, effective immediately. This policy includes YouTube, Facebook, MySpace, Twitter, Google Apps, and other social tools.

Somewhat quietly, myYearbook remains one of the most popular social networking sites, with 20 million members and a place in the top 30 most trafficked websites in the US.

Do you frequently make bad-decision texts — the kind of texts that likely show up on Texts From Last Night ? Well, then, you should probably download TigerText, a new iPhone app that will let you delete those digital mistakes from another person’s phone. TigerText [iTunes link], which was released yesterday, could be a boon for cheating politicians and foolishly sexting teens alike, according to founder Jeffrey Evans, who claims that he named the app before the Tiger Woods scandal

The Nielsen Company measured online buzz around Olympic athletes and found that skiers Lindsey Vonn (U.S.) and Alexandre Bilodeau (Canada) are the most buzzed-about gold medal athletes for their respective countries. The analytics company compared online buzz surrounding gold medal winners in both Canada and the United States. The data comes from the company’s database, which continually looks at consumer-created online content in the form of blog posts, blog comments, board/forum discussions and threads, group activity, selected Twitter feeds, citations/links to YouTube videos and news stories

Twitter fundraising has steadily been on the rise in the last two years. Twitter has been used to raise hundreds of thousands of dollars for charities and charitable causes, and has been used to spread awareness about social issues

Ever wanted to Facebook friend someone you just met right on the spot?

This post originally appeared on the American Express OPEN Forum , where Mashable regularly contributes articles about leveraging social media and technology in small business. So your business is on Facebook, and brand engagement is up thanks to some savvy social media strategy