My thoughts are the module should start from the oldest post (most likely to be, broken, deleted or 'out of date'), run from a cron or pseudo-cron trigger/task and check a configurable number of posts, keep track of it's last checked story and continue from there on each successive cron trigger..
The module should be configurable to either place a failed story into 'upcoming', moderation, discard or else do nothing but email the admin with a link to the story..
The action should also be configurable for counts of failed check attempts as the referenced server downtime could cause a false trigger.
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