I have a broken Viewsonic VMP75 media streamer. I'm using its remote. You can see the remote pic in the link. Ideally, I would want to use the Boxee remote but they're out of production now. One sold for over $100 on ebay a a week ago or so. For a while Dlink sold the Boxee remote with an RF dongle. The Boxee remote has all the essential navigation buttons on the front and the qwerty on the back if you want to hit the "i" button for example for media info (in Plex). A full on RF keyboard is way to clunky and I'm not impressed with the mini versions out there. The Boxee remote also feels right in your hand.
http://www.hdtvsolutions.com/ViewSonic_NexTV_VMP75_Review.htm