Alan Gerow has updated his Text app for the Nintendo DS:
I have finally gotten to a point where I am comfortable releasing v0.3 of TxtWriter. This version has intra-document editing, so you can edit and make changes at other points in the document other than the end. It also has a much spiffier user interface, and dialog boxes for confirmations and alerts. It has an updated extended keyboard and more use of the keys. The F1 key now saves a file and F2 opens the file menu so that all operations, except for delete, can be done via the touch screen.