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Changing "message:" protocol handler from Sparrow back to Mail.app
How to remove a subproject/submodule to a git-svn repository
To sum up, you delete the offending directory and then run something to the effect of
git filter-branch --index-filter \
'git rm --cached --ignore-unmatch path/to/the/formerly/misbehaving/module'
I accidentally added another git repository to a git-svn repository, which makes it die when trying to push the changes. This technique helped me fix it. Documenting mostly so I remember when it happens again sometime.

nwdiag - simple network-diagram image generators — blockdiag 1.0 documentation
nwdiag generates network-diagram image file from .diag file. .diag file is similar to DOT file (graphviz’s).
You can get diagrams like this.
Very useful, like Graphviz but specifically for network diagrams. You can probably obtain the same result with Graphviz with the appropriate amount of dot magic, but nwdiag makes this very easy. Other useful graph types in sister projects: http://blockdiag.com/en/index.html
How One Bit of Stupidity Could Have Brought Down a Multi-Million Dollar Media Company | Peter Shankman
the man sitting next to me was reading proprietary information, information that could be very, very damaging to this company if in the wrong hands, and he couldn’t have cared less about it
Fascinating, scary story. It's amazing the things people do in airplanes (particularly on their laptops/iPads/phones) as if no one was watching them. Situational awareness is very important.

National Geographic Photography Contest Winners: 2011 - The Big Picture
It's been a while since a linked to a Big Picture set, but this one deserves it. They are all beautiful photographs.