Nuclear Elements has Nebulous Notes w/ DropBox intergration (iTunes Link) in the iTunes App Store for FREE for a limited time.

Nebulous Notes is a powerful, yet simple, text editor for note-takers, writers, and coders. (If you want to try-before-you-buy, check out “Nebulous Notes Lite.”) Your notes are backed up and available from Dropbox, the best back-up service in the world. Free accounts on Dropbox come with 2GB of space, enough to store 500 copies of Leo Tolstoy’s War and Peace. Nebulous Notes has been featured twice on Lifehacker.com as one of the best tools for getting things done.