The Socials Ignited plugin gives you a widget, allowing you to display and link icons on your website of more than 50 social networks.
Lotsa social icons here and simple to use. What would make it perfect would be shortcodes for page/post insertion -- right now, this is just a widget -- and maybe an easy graphical custom CSS/HTML control panel -- though that's just nitpicking!
This plugin just plain works.
I love CSSIgniter and their products. (No, I don't work for them - or get paid anything to say so) ;)
Give this a shot. Very nice work!