So far, I'm quite impressed. Much of what's included are essays I've already seen in one form or another, but a number of them are new to me, and all of them are, indeed, quite well written and thought provoking.
A few that stuck in my head:
danah boyd's "Autistic Social Software" - What a fantastic articulation of what's wrong with, well, all sorts of stuff. I need to go back and reread this a few more times, but even the first pass gave me all sorts of ideas that just won't get out of my head.
Bruce Eckel's "Strong Typing vs Strong Testing" - I had much the same thought process as he did regarding the code examples in my book, and if I ever do it again I'm going to automate the testing process, because he's totally right, just because it compiles doesn't mean it works.
Eric Johnson's "C++ - The Forgotten Trojan Horse" - I'm biased here, I used to work for EJ, but seriously, take my word for it, he's right on the money with this one. It's funny though, how easily I can see the seeds of this essay in his old posts on our internal newsgroups back at $COMPANY, especially the one where he compared C++ to a drug dealer and template metaprogramming to a weekend bender. I really hope that having this one published convinces him that he needs to write more of these, because I know for a fact tha the's got a lot to say.
Anyway, that's just a few of the essays I made it through today. The whole book is fantastic though, and you should absolutely pick it up when it's available in dead tree form, I know I intend to.