Installing APC on Media Temple Grid Server
The tutorial appears to work fine. The command in step 8. has some weird non standard dashes in the article, it should be the following:
./configure -enable-apc -enable-apc-mmap -with-apxs2=/usr/sbin/apxs -with-php-config=/usr/local/php-5.2.6–1/bin/php-config
EDIT 2010-09-24: The original article is down, look here for a replacement,