It's a blog.
I’m going to use the default Apache and PHP that come from the CentOS repositories (until I get irritated enough with how old they are…).
So I just did an install of php-pecl-memcache and let yum fetch the “dependencies,” which, in this case, included Apache and PHP. O:-)
In other news, I’m slightly confused about why memcache isn’t a package I can install, but the libraries for it are?