Possible to add unique Favicons to Multisite blogs?

I'm wondering if it's possible to add unique favicons for the unique blogs on a wordpress multisite, BP enabled blog? So, I would like to add favicons at the following sites/subsites:

http://www.networkit.com
http://www.networkit.com/ashevillechamber
http://www.networkit.com/tvhra

Can this be done? If so, how? Thank you.