There was a sparring demonstration done at SwordFest 2009 event with RSW by my friend Steve Baxter and various participants.

Here are the videos:
http://www.youtube.com/watch?v=DFyNHx7zcH4
http://www.youtube.com/watch?v=INB1odZkZo0

And one that Steve done with his students at Ishi Yama Ryu dojo:
http://www.youtube.com/watch?v=BPH09fZ0-XU