My slides from the "APC & Memcache the High Performance Duo" talk are now online and can be found
here.
In the slide I mentioned that memcache is available of *NIX only, which thanks to at least two attendees I know to be incorrect. It appears that there is a working (albeit old, circa 2006) memcache win32 version, which you can find here:
http://jehiah.cz/projects/memcached-win32/
Once you install it, you'd need to compile memcache PHP extension on win32 and then you should be set.
The slides from my "Common Optimization Mistakes" talk are now up and can be found
here.
The slides from my talk, introducing PHP 5.3 are now up and can be found here:
Slides