The icon clicking has a slight bug. When the page loads and I mouseover the black icon, it turns white and the smaller icons fall into place. All good there. However, if I click on the white icon without moving the mouse off it, it turns black for a short time, the icons go up off the page and then come back. Is this by design? It was a little confusing to me.
Another strange behavior related with this icon set, is if I click on one of them, it opens up Facebook if I click the Facebook icon. OK. That is fine, but when I look back on your website, the icons roll up and the icon turns black again. To me, the icons should stay down unless I click on the white icon which should send them out of the way.