In the previous post I talked about my reservations regarding the way that iCloud syncing is handled in an app like Byword, but forgot to mention that Byword for iOS includes Dropbox support for syncing as well as iCloud.
I tested it a bit, and iCloud definitely works more seamlessly in this version — changes tend to get picked up faster on both ends — so you're still compromising (for now) one way or another with or without iCloud. It is possible, however, to use Byword on iOS without changing your entire workflow.