network theory

Network/graph theory is a powerful branch of mathematics that seems to pop up in so many interesting but, on an un-abstracted level, dissimilar systems. I have though somewhat about this project in terms of graph theory, possibly using an object-oriented paradigm to implement it as a weighted pseudo-/multi-graph with objects representing nodes and links. Nodes would be specific events and/or specific quantities, e.g. location on the solar disk. Links would be weighted by some meassure of similarity. Cool thing about using a graph theoretic mindset is that there are many other examples I could draw from, e.g. social network graphs on Facebook.