Andrew Ng's Coursera MOOC on Machine Learning covers the same material (even has an exercise on recognizing handwritten digits). There's more meat in this chapter, but Ng's introduction is more gradual and hands-on; both are worth a look.
Amazing recount of the creation of T, the first production-grade Scheme implementation. Funny quote: "I fashionably decried premature optimisation in college without really understanding it until I once committed an act of premature opt so horrific that I can now tell when it is going to rain by the twinges I get in the residual scar tissue. Now I understand premature optimisation." (Olin Shivers)
A keynote address. "To address these flaws, I propose that the W3C be disbanded, and that the leadership of the web be reorganized around open-source software principles. I also encourage designers to advocate for a better web, lest they find themselves confined to a shrinking territory of possibilities."
A starting point for a series on category theory. Some of the math in the author's articles goes whooshing over my head; but he's tried hard to write approachable introductions to several mathematical topics that have application in programming.
[Video]. "This is the extraordinary thing about creativity: If just you keep your mind resting against the subject in a friendly but persistent way, sooner or later you will get a reward from your unconscious."
This would be a nice feature to have... eliminating intermediate tables would be nice, but I think the real bonus is being able to constrain the number of relations in a *-to-many relationship (e.g. a group must have exactly N members) without resorting to triggers.