Live Long and Puzzle On
Wolfdog has posted the logic puzzle blog, Grandmaster Puzzles, featuring "elegant, hand-crafted designs written by some of the world's best puzzle constructors" ... and Mefites have some more recs in comments.
Highlighting the best bits from the MetaFilter universe
MetaFilter started as a community weblog in 1999, later added question and answers, then music by members, jobs, projects by members, a podcast, and finally an area dedicated to meetups.
