Have a browse at the latest updates on eGerbil's behaviour page.  The content information and pictures showing various aspects of gerbil behaviour has been greatly expanded.  It also now includes informative videos on various behaviours made by Loz Whitmore for eGerbil.

Also linked from this page are instructions on making a burrow system which helps reduce the stereotypical behaviour of burrowing excessively in corners, which you can also reach by clicking here.