Bootstrap is Twitter's toolkit for creating rich and more consistent web interfaces across browsers and devices. The Bootstrap ecosystem offers, among other things, an iconic font, themes, a customization generator, themes for Wordpress / Drupal + / Joomla, templates for Fireworks / Photoshop, a button generator and a jQuery UI theme. How to get started? Check out this tutorial or this series or even this. Built With Bootstrap has lots of examples on how developers are putting Bootstrap to good use.
This February, Twitter released Bootstrap 2 a rewrite of their earlier Bootstrap code. It's basically a framework that offers barebones styles and functionality. What's of interest, though, is that it uses almost no semicolons (just 15 in over 1k lines of code), which are normally used to separate lines of code. Instead, the code relies on automatic semicolon insertion (ASI). Unfortunately this code breaks when minified using JSMin. This was reported as an issue on Bootstraps's github page which led to a heated discussion on the topic of ASI. [more inside]
Churning out code all day is all well and good but for a feeling of a job well done nothing can take the place of making something with your own hands. Dave Gingery will show you how to build a foundry to cast parts for a lathe which you can use to make a shaper which you need to build the milling machine etc etc :) Also worth a mention is Ron Reil who knows a thing or two about propane burners for foundries (last link has a very cool pic).