Most likely, no. Apple did say that they have no information regarding this subject.
Does anyone know if Macrumors will email us when the keynote video is up? I don't want to sit here refreshing the page.
The new device connectivity allows you to communicate with devices over the dock connector or bluetooth using custom protocols if you so wish.
That leaves open the possibility for a 3rd party to create a dock connector or bluetooth keyboard that works with their application.