Click here for the FB Fan box widget. You can add it to your blogger site just by clicking a few buttons.
Note to my clients and others using the 2-column Minima template:
You will want to modify the width of the widget to 220px and add code for the height, depending on how many fans you want to show up in the widget. The default is 10 fans, but if you want more, then add the following code so it looks like the image below:
height="400" (adjust to your needs)
I found more Facebook widgets on Widgets for Free and they also have Twitter widgets and more.
It's hard not to go crazy with all the widgets in the side bar. Remember, you can change where they show up in the Layout tab by clicking on the element and dragging it up or down.