advertizing keyboard macros better [was: Unuseful keybindings]

[Drew Adams]

> I don't use keyboard macros often enough to justify 
> binding f3 and f4.  On the other hand, we really don't do
> enough to publicize keyboard macros. No other editor has
> good macro support, and the feature is a great competitive
> advantage for Emacs. It'd be nice to introduce new users to 
> keyboard macros earlier.

It's been a long time since I've gone through the Emacs tutorial.  Is there not
an example or two of creating and using a keyboard macro there?  If not then
perhaps there should be. Likewise for any "tours" we provide.