Since this is on the front page of HN, I'll share a more recent and more detailed article from LWN about this.
http://lwn.net/SubscriberLink/641275/43136cb3c973ec6c/
Consider subscribing to LWN!
http://lwn.net/SubscriberLink/641275/43136cb3c973ec6c/
Consider subscribing to LWN!
Having the articles become free no matter what, and having articles of a level of quality that they _Repeatedly_ get referenced in papers on computer science, is a great feat.
Are there any other magazines online that have a good, weekly/bi-weekly posting schedule of multiple, high-quality and on-topic articles? I've seen ones related to photography, but not that have the same focus and high quality as LWN.