Funny thing is: I've tried to successfully learn macros (or a part of it) from a number of different sources, but those slides were the most enlightening source to me.

I'm guessing you found it now, but there's a very readable paper that talks in more detail about the examples: http://www.cs.brown.edu/~sk/Publications/Papers/Published/sk...

Hey! No, I've never come across this... I gave it a read. They're slightly more informative than the slides (regarding to macros). Thank you very much!