Here is an example showing how to use absolute positioning to move one of the widgets from the sidebar into the header area:
Note that CSS is based on your theme choice Twenty Eleven and the widgets you currently had installed when I checked your site.
To do this for social media buttons, first add the buttons to a text widget as timethief recommended. Then view your page source and find out what the ID for that text widget is (we can help if you post back after you've added the text widget). Replace "archives-3" in the example with your text widget ID value. Last, adjust the top and left values to place the widgets where you want.