A few small hiccups..
Following these instructions, the mysqli.so library was not built, and the directory referenced does not exist.. step 14 does not work as described. (on ubuntu 10.04)
Here's what I did for step 14:
sudo mkdir /usr/lib/php5
sudo ln -s /usr/local/lib/php/extensions/no-debug-non-zts-20060613/apc.so /usr/lib/php5/apc.so
sudo ln -s /usr/local/lib/php/extensions/no-debug-non-zts-20060613/memcache.so /usr/lib/php5/memcache.so
sudo chmod +x /etc/init.d/php-fpm
sudo nano /etc/php/php.ini
make these changes to php.ini:
extension_dir = "/usr/lib/php5/"
I don't recall any further deviations fcrm the instructions being necessary -- I skipped the phpadmin piece.. drupal 7 is screaming fast with this set up on my 512MB linode. Thanks for the guide!