I found this site while googling "online reference management software". It's a blog with lots of interesting articles, for those who are interested in such things.
Apart from periodic reviews on reference managers, other articles I liked were:
Stop Powerpointing and Start Outlining in which the author points out the disadvantages of using powerpoint to plan your talk, and suggests n alternative method,
and a discussion of a post from Luis Ahn discussing the difference between research and publishing papers.
What is even more dangerous than not knowing. Have n't we all seen and met people who seem to be doing something grossly wrong and are totally oblivious of...