Byword, my favorite Markdown-slinging Mac text editor for a while now, got a big update today to coincide with the release of Byword 1.0 for iPhone and iPad. On the healthy list of changes for the Mac version is support for iCloud sync with the iOS version, complete with a new iCloud-dedicated document manager similar to what you’ll see in Mountain Lion. Dropbox sync is also supported.
If you want a simple, powerful way to write, preview, and effortlessly sync your docs across Mac, iPhone, and iPad, Byword is a great choice. I switched months ago, and its debut on iOS made my week.