There are lots of librarians on the Commons, and about a year ago, fellow Commons Facilitator Brian Foote (@brianfoote) started a wiki page to compile links to their work, focusing especially on blogs and groups.
An amazing amount has happened since! Included below are some updates, and a bunch of images, one year later.
Please feel free to contribute more links and annotate the existing ones!
The following comes directly from a Commons Wiki page.
The document has moved here.