The slides from my two talks at PHP|Works are now available online for download in PDF and Flash formats, they can be found here: http://ilia.ws/talks/. You'll need to scroll to the bottom of the page to find the download links.
Overall I think the talks went very well, and I hope that all the people who have attended found the material covered interesting and/or informative. I won't presume to assume the talks were fun, but c'mon what do you expect from a technical talk
In Cache for Ca$h on page 7, write_cache() is called through register_shutdown_function(). I was thinking about what happens when user aborts the connection and if ignore_user_about() is not necessary. After all, it isn't necessary because a PHP script is not aborted until anything is written to the output and there's nothing written in the script due to ob_start(). But if the code would be changed to output intermediate results (e.g. by setting 2nd parameter of ob_start()), ignore_user_abort() would be necessary.