I signed up for Pinboard a little over a month ago, finally cleared my "must read this" email labels to it, and haven't looked back. I find myself spending a lot of time in it now, reading documents and taking notes. Recommended.
My pins are private, so I haven't bothered including tags, and I'm doing this on a pull basis rather than daily. :o)
Colin Scott's update to Jeff Dean and Peter Norvig's numbers, with an interactive sliding widget to get data for different years. Nice visual display of how things have changed (and are expected to). Also useful for back of the envelope estimation.
Fascinating paper that locates the source of the "software crisis" in complexity. Surveys the sources of that complexity, approaches to dealing with it, and a possible way forward (functional reactive programming).
John Allspaw's notes on what differentiates mature or senior engineers from junior. Good advice, lots of interesting links out.