Yes, posts here are moderated. Th eone you posted was on SNMP MIBs. It has been passed to the site editors because the PRE block is considered to be too wide resulting in horizontal scrolling - frowned upon in the monastery.
There are some suggestions on the preview page about the use of PRE, in particular - it is not suggested! But if you must, keep the width down.
The editors will consider it and if they can make it look okay it will be approved.
To elaborate slightly on the previous answer, anything you post to a specific section, eg meditations, sopw, discussions, etc must be approve by a level 6 monk or higher before it will show up in that section. You can look at newest nodes if you wish to see it before that.