Shake it Baby
I just finished a ShakeObj plugin that is based on the idea of Fabricio Chamons Camera shake addon.
The script adds a null below an object and applies a random expression to the local transforms. You can tweak the amplitude and the frequency for each channel, to get a jittery shaky random animation on any selected object you apply the script to.
You can access the command via Animate–>Actions–>Apply–>ShakeItBaby
Download the “Shake it baby 1.0” by clicking on the Link.