The Ecology stuff is slightly hokey, but I especially liked the 2003 Stephen Wolfram Mathematics video from the UC series "Frontiers of Knowledge," in it he gives the gist of his book "A New Kind of Science" (the book itself is actually large enough to be considered a deadly weapon).
Generally it has the thesis that simple rules can lead to statistical randomness and thus overall complexity. There are some much more provocative things in there that also seem to suggest a possible unification of general and special relativity.
I will be sure to come back to this page for general perusing...Thanks!