I coded my first drag & drop in 1999 using DHTML. It worked on both major browsers, NS4 and IE5. It's sad to see that 10 years later it still is a problem to use drag & drop in web development.
I just hope that when PPK unwinds a bit that he presents the issues he experienced to appropriate W3C feedback channel... written in a more factual style. We really need them to hear this.
Considering how popular PPK's site is and that the first person to reply is Hixie, the author of the HTML5 spec, I think they'll already know his feelings by now ;)