I use NoteCase all the time -- on the N800. It's the best note-keeping program I have found so far. it isn't "read only." It allows RTF. The N800 soft keyboards work normally.

I keep the list (tree) of items on so that I can quickly access my random notes. Accessing a note takes <0.1 sec. I use it for storing/encrypting passwords, storing random lists or bits of information and for accessing business card scans. It exports to txt or html.