Take advantage of some brand new features on your MathMods profile. Now, when you've signed in, you'll find a few new fields in the Edit section that will allow you to show your visitors:

•  a LinkedIn badge,
•  a Twitter Follow-me button (if you wish, you can also show your Tweets on a dedicated Tab!),
•  a Facebook Find-Me button.

Take a look at these two photos to get a better idea of how it works or visit this example profile.