Traackr identifies online influencers not just based on Twitter or Facebook activity, but on their digital footprint based on topics and keywords.
WordPress' excerpt field is a great way to optimize blogs for clickability, readability, as well as search engine optimization (SEO).
A roundup of posts that includes ways to use social media in a crisis, using Twitter to settle a defamation case and a job opening at Socialbrite.
Every time I learn how to do something new, I feel the same exhilaration as when I learned to ride a bike.