Hey, I added LinkedIn to the plugin, here's my full modified code from simple-social.php:
Also, I added the WP-PHP widget plugin and entered:
<?php echo simple-social(); ?>
so now I have it in a widget. I'm sure I could have created a registered widget too.
Just figured I'd share so that you could add it to the next release.
You can see the widget here: http://www.pollenbrands.com/eco-branding-website-smackdown-apple-vs-windows/