C-SPAN Video Library "indexes, and archives all C-SPAN programming for historical, educational, research, and archival uses." (Content is primarily US politics but see here for overlap with other subject areas.) All programs since 1987 can be viewed online for free.
Following in the popular footsteps of the Fake AP Stylebook Twitter account ("Use a hyphen to join words together, a dash to separate two words that really don't like each other.") come rival accounts Fake AACR2 ("2.17B1. Describe an illustrated item as instructed in 2.5C. Optionally, add woodcuts, metal cuts, paper cuts, etc., as appropriate.") and Fake RDA ("2.3.3 When attempting to parallel title, line title up to proper title, put title in reverse, turn left, shift into drive, turn right.")
- Embedding chat widgets within EBSCO databases
- Darien [Public] Library offers prizes to Foursquare checkins at their library
- Lincoln University uses their page on Facebook to promote their own Foursquare check-in and to chat with students about famous pranks
- Crowdsourcing: How and why should libraries do it? includes a huge number of examples of successful crowdsourced projects (ie projects where the bulk of the work has been done by individuals of the general public a few bits at a time) and what has made them successful
- Common Craft have made a new "Augmented Reality" video in their "in plain English" series