Social Networks users actions flow charts & wireframing
oziumjinx: Probably one of these:
http://patterntap.com/
http://ui-patterns.com/
http://quince.infragistics.com/
http://www.smashingmagazine.com/2009/06/15/40-helpful-resour...
http://www.uipatterns.net/
http://www.patternbrowser.org