The current "Once, Weakly" is a discussion of why one might want to
implement a clone operation in a hierarchy:

Attack of the Clones:
This "tutorial" item looks at the utility of implementing a
clone operation on a hierarchy, and discusses its implications
for designing frameworks and ordering a meal in a Swedish
restaurant.

On another topic, I'll be speaking at Software Development West in Santa
Clara, CA the week of March 24th. I'll be giving the following
presentations:

1-Day Tutorial: Practical Design Patterns in C++
Writing and Augmenting STL Generic Algorithms
C++ Hierarchy Design Idioms
C++ Gotchas

I also understand that Addison-Wesley will be having me do at least one
book signing for "C++ Gotchas."

Hope to see you there!

Steve