I was just surfing the web and found this really neat article on "retrocausality"; or the concept that the effect can actully be realised before the cause. Really neat stuff. Long article though.
http://sfgate.com/cgi-bin/article.cgi?f=/c/a/2007/01/21/ING5LNJSBF1.DTL&hw=photon&sn=001&sc=1000