Brett Terpstra’s simply awesome feature comparison of text editors for the iPhone and iPad. It’s exhaustive and if you’re on a craptastik Century Link DSL connection like me, let the page fully load before trying to do anything other than read the opening paragraphs. I love the chart and was able to quickly find iTextEditors that had desktop companions which was a deciding factor for me.
My current favorites (I can’t decide on just one) are Byword (iTunes Link – Mac App Store Link), iA Writer (iTunes Link – Mac App Store Link) and Writing Kit (iTunes Link). I wish Writing Kit had a desktop app but I guess you can’t have everything.