The poems (describing the journey of a cocoa bean), were judged by Meg Rosoff and not only are the winners themselves printed in full on the website, but there are some great videos of the judging process and of Meg reading the poems aloud (great accent!). Worth a listen/look, I think! (WARNING: you will almost certainly want to eat some chocolate!)
Still on the theme of poetry, the Writers Bureau are running a free Royal Wedding sonnet competition (closing date 30th April and you can enter by email, so if you really want to cut it fine, you could wait to be inspired on ‘The Day’ itself, 29th April!). First prize is an on-line poetry writing course.
Sonnets are not the easiest poems to write as they have to adhere to a strict rhythm and rhyming pattern. If you’re going to write a Shakespearean sonnet, in iambic pentameter and all that, then you can read some tips here.
My top tip would be: keep it simple! And good luck!