I'm a fan of the Kindle BB App. It works quite well on my Storm. I know that actual Kindles come with a built in dictionary but the App doesn't bring one along with it. Since the Dictionary.com app is nothing more than a front-end to the website, I've been looking for a good dictionary to use on my Kindle App.
I would also love to get some suggestions on other apps or ways to use my Storm as a dictionary. I have yet to find a good, easy, and fast system for looking stuff up. Suggestions are always appreciated!