Change the Right Sidebar in WPMU Dixi

My site is http://www.economicnoise.com. I am using the Dixi theme. The right sidebar appears coded in the theme. How would I eliminate some of the widgets in the right column? For example, I no longer use tags and would like to remove that part. Other widgets might be be better replaced as well.

I selected Chat above. I have no problem with that but cannot submit unless I choose a plugin.