+1 on Shinglejohn's idea to crush. Would add way more flavor than, dicing. I think you should rack on a crushed pepper. I would hit it with some kind of no rinse sanitizer first though because this isn't hops...sanitize the knife/hammer, cutting board, and pepper. Oh, and make sure if it's from the supermarket you get that wax off of it. I think this is a great idea for an IPA. I like the idea of keeping it fresh, because there isn't a fresher smell, taste, texture then a green pepper, and combined with that crisp zest of an IPA...I think you're on to something.