Neat ! Can I additionally suggest that the sentence:

We suggest submitting links with a short description.

be prefaced with something indicating what kind of things new posters are encouraged to submit ? Say, something like:

The typical LessWrong post is a brief essay inviting reflexion on how to think better, or reporting on relevant news; there is considerable latitude in format, topic, and tone. New posters are encouraged to use the Search box to ensure the topics they introduce are original. We suggest submitting links with a short description.

ETA: Forgot something that might be a valuable way to ease the transition from "commenter feeling their way around" to "beginning poster":

You may want to start by commenting on others' posts, and noticing when your reasoning or information is particularly appreciated by the community, as indicated by upvotes. A longer comment with many upvotes can sometimes be turned into a top-level post, if it has few dependencies on the rest of the discussion.