Khan Academy has some nice, easy to understand videos on calculus. It depends on your current level of knowledge of course, but I found them useful when I was going back over learning stuff I'd forgotten from school.
A part of our core app at work pulls in data from a remote source and the other day the remote server was giving a 502. When I came to test it, everything was fine again but I fixed the problem and wanted to see how it reacted again to a 502. I thought it'd be nice to have something where I could specify a status code and get that code back.
Oops, didn't pick up on this - it works fine on my machine (without adding exception). I've removed the non-ssl redirect while I get it sorted. Thanks for the heads up :)
It's great that companies post articles describing their architectures and backend systems (and I'm certainly looking forward to your follow-up post detailing your caching system) but why show a picture of commodity hardware available for anyone with enough money? What's impressive is your skills, now how much money is in your bank account.
You have no idea how long I've been waiting for something like this to come along! Really great feature set and looks great, you've done a terrific job.
Wake up, shower, make sandwiches for lunch, grab bike and ride to work (this is the Netherlands after all, you get funny looks for walking), arrive at work and grab a coffee and a water, catch up on HN, Twitter, Reader, commence working.