Scholastic - Poetry Idea Engine - Learn how to write a limerick at this interactive site from Scholastic. There are also tutorials for haiku, free verse and cinquains.
Irish Blessings - It just wouldn't be St. Patrick's Day without Irish blessings! Here are blessings for a variety of occasions.
BBC: Poetry Study Ireland - This BBC page, although no longer updated with new information, has a wonderful collection of Irish poetry, grouped into themes. For many, you can listen to English or Irish audio recordings.