The number of options available in the Info dialog have been increased and you can now enter a multi-line description that will appear in blue under the task item name. With descriptions you can add details to the task without having to create additional supplemental tasks.
There have been quite a few new shared lists added recently including some useful ones on wedding planning such as Wedding Reception Planning, Brides Wedding Checklist, Plan Your Own Wedding, and Simple Wedding Checklist. You can find more in the Wedding Checklist project. Clone a list into your own account and you can easily add items and modify existing tasks. Then share your updated list with others!