Mark Headd recently posted a short overview (and screencast!) that demonstrates how you can build an application with open data and make it available with SMS.
Daniel Spiewak’s Scala for Java Refugees provided me with a helpful introduction to Scala recently. I recommend it.
David Röthlisberger put together a fantastic guide on how to get started with Emacs that I’m going to point people to from now on.
If you use OS X, want fullscreen, and are extra brave, replace his brew command with:
brew install emacs --force --HEAD --cocoa --use-git-head