this is a bit tangential, but i'm actually kind of surprised that there's no plan to include semantic markup for poetry in HTML5. just came across
this article which outlines different markup solutions for poetry, and proposes a, albeit kind of idealistic, set of poetry elements.
i'd actually also agree with Jellby that his <div class="stanza"><div class="line"> arrangement is semantically closer to poetic form than using paragraph elements.
anyone tried concrete poetry with <pre/>? maybe i give it a go later on.