Did you try some USB keyboard? What happened?
Why I ask is that many work on many machines (I can't try yours because it's not here!) But what I'm seeing are the apps that need work. Since many apps are not from Samsung, strange things happen. I noted that at http://forums.cnet.com/7723-13973_102-579587/that-youtube-app-hdtech-will-love-this/?tag=contentBody;threadListing
Off to update my new finding.