Thanks for such a good talk. The introduction to map was really good, I had mostly used sets before this.
A lot of folks come from C or do not use deep C++ (like templates & STL). If you can talk about some useful idioms that can pull them into STL (and why they should), that would be cool! IMO this would also reach out to a huge audience, all those who do C-like
or C-with-classes style of programming in C++.
One example is how C-style arrays can be used almost everywhere in STL-land as vectors and thus gain the ability to be sorted and searched for free by using STL.