I think I did come across that one, though I didn't really look too much into it. It looks like it's more strictly writing, though being able to access with wifi might be helpful. I did end up buying an iPod touch, and I got the Auteuriest app, which is pretty neat. Wasn't really able to do much with it right off cause the copy/paste wasn't working right, but got an update that fixed that last night. I like it because it's got sections for characters, places, research, all that fun stuff. Which is usually what ends up causing me problems if I'm not at home. I forget names and stuff and can't refer to notes when I don't have them. And I've found the notepad to be really helpful when I get random thoughts at work. Plus the fact that everything syncs with my Mac, so I don't have to do anything but hook the two up.
And looking into mywritingnook more, it requires a google account, and I think I already have way too many different accounts already.