I do have a great phonics activity called Pirate word ladders, that can help students start thinking about different spelling patterns but I want tons more ideas.
So my new project this summer is to focus on spelling instruction. I'm going to go on a professional reading spree about the subject and share my thoughts and creations with you. My first goodie that I've found is at the Teachem2think site. About half way down the page is a great chart on fun ways to practice spelling.