An old favorite ...

http://searchyc.com/submissions/as+we+may+think?sort=by_date

http://news.ycombinator.com/item?id=1006264

http://news.ycombinator.com/item?id=768498

http://news.ycombinator.com/item?id=70998

http://news.ycombinator.com/item?id=21095