Jeff Rush stepped through the slides of a David Beazley PyCon UK 2008 presentation titled "Generator Tricks for System Programmers".
It was fantastic; we went though the whole presentation and had a lively discussion to make sure everyone understood each slide. Personally, I gained a whole new perspective on the usefulness of generator functions and coroutines. It gave me a lot of ideas for the ETL stuff I sometimes work on.
Ralph Green also gave a walkthrough of the code he has written to produce secure barcoded raffle tickets for PyTexas prizes. He has put together a program which will allow us to use a barcode reader to quickly look up the name of each person associated with the unique ticket id, and display that on the screen for all to see.
Thanks go to Fish Technologies for generously hosting our meetup.