Accidentally, I’ve found an interesting project - a tool that is able to analyze your source control repository (SVN, Git, Mercurial, etc.) and visualize all the changes that happened - branching, expanding, merging, etc.

You can find the tool here: http://code.google.com/p/gource/
And if you just want to check how does this visualization look alike, here are few videos you may like:
P.S. Oneliner of a week - definitely something to think about - "Being busy is a form of laziness - lazy thinking and indiscriminate action" (Timothy Ferris).
P.S.S. New word of a week - "Askhole" - someone who always ask you tones of questions, but always does otherwise.