Check out the tweaks I've made to the network timeline for my gnuSocial instance!
https://community.highlandarrow.com/main/all

Got some nice icons going, I think, and now they will go colour if you mouse over them :D

When I have what seems to be a complete set, I will release the image pack and CSS necessary to add it to your own network timeline ^_^

Hopefully, I will be able to cobble together a plugin for Qvitter or some other means, that allows one to easily manage what icons are used.