I think that most of this blogging activity has been inspired by Ben Horowitz, who is by far the most active and best blogger of the bunch.
But the other blogs are quite interesting too, and there are some additional interesting materials on the site. If you're interested in the software industry, and more specifically in the VC-funded software startup industry, there is a lot of interesting material to see here, including blogs from:
I know from my own experience how much time and effort it takes to write a blog. I'm pleased that this group, who have lots of experience and knowledge, are investing the energy into sharing their thoughts and opinions; hopefully it will inspire others to do the same, and in the meantime it means more interesting essays to read!
To get you started, check out Ben's recent essay: Hiring Executives: If You’ve Never Done the Job, How Do You Hire Somebody Good?.