I haven't heard anything official, but its only logical for them to release a Wiiboard. If nothing else I am sure support for usb keyboards will be out fairly soon (either by Nintendo or someone else).
If anyone does know of any offical news of something like this, let me know.
i used it this morning, it was extremely disappointing. i had trouble scrolling, and the #1 thing i was hoping it could do was work with www.sirius.com... unfortunitely the opera browser doesn't work with sirius online