Well, i guess "usable" is subjective. One of the selling points of Conboy, the raison d'être so to speak, is that it is compatible with Tomboy, a PC note app. It's probably best used by people who are going to use that capability. On the other hand, one of the selling points of Zim, a somewhat similar wiki-notepad, is that it stores its notes in plain text. Maybe Zim is a better fit for you?