Josh Betz

A simple plugin that allows blog owners on a multisite network to use a custom favicon by uploading it to the root of their theme directory. Ideal for people who host clients on their own multisite install or want to run multiple domains off of one install.

Network Favicons

Allows blog owners to use a custom favicon just by uploading it to the root of their theme directory.

azurecurve

Allows each site in a network to set a distinct favicon. Set a network path and favicon to be used if a favicon is not defined for a site.
This plugin is intended for multisite WordPress installations, but will work and allow easy changing of the favicon of single WordPress blogs.
This plugin supports language translations. If you want to translate this plugin please sent the .po and .mo files to wordpress.translations@azurecurve.co.uk for inclusion in the next version (full credit will be given). The .pot fie is in the languages folder of the plugin and can also be downloaded from the plugin page on http://development.azurecurve.co.uk.

azurecurve Multisite Favicon

Allows each site in a network to set a distinct favicon.

Network Favicons vs azurecurve Multisite Favicon