The Scheduled Web, and more on thin CalDAV servers

It's been a quiet month but two things caught my attention ... within minutes of each other:

• Nova Spivack's blog post from May 6: The Birth of the Scheduled Web.
• Lincoln's comment (and the previous 7 comments) on my October 2008 post, Quest for a Thin CalDAV Server.

I'm also still contemplating what can be accomplished with the new CalDAV support in my iPhone 4.0 software. Is anyone out there doing any interesting and new calendar sharing with it? Or just untethering more from PC-and-Mac-based iTunes?