Slightly silly question, but can anyone tell me what font he uses on the first couple of code screenshots? Something about them look astoundingly clear, and I can't figure out what it is about them.
Also note the website it is hosted on - DonationCoder. Arguably, this is one of the nicest communities that revolves around software and development. I can't compliment it enough, got a ton of useful feedback there, always in a friendly and respectful manner. Not too much unlike the HN actually.
(I wish my code looked like that)