Here is a very neat tool for less than three minute comments/screencasts called Quick Cast.  In this screencast I am showing one of my favorite writers, Joseph McCaleb, how to use Diigo as an annotation machine and blog post aid par excellente. I love these ‘low-friction’ tools for sharing/making/ and otherwise doing a routine act in a non-routine way.  Lots of applications in rhetcomp.  Think of it as an extended Vine or Instagram.