When did the latest news get there? -->

by Claude Errera , Monday, March 04, 2013, 16:23 (4071 days ago) @ General Vagueness

Underline already exists - you just have to write it in yourself. (u and /u)

Is there any other non-button-having markup we should know about (or some place we can look it up)?

You got me - I only knew there was underline because I tried it.