Slide and glide
Previously I've mentioned the Leeton park remix project I'm developing for the centenary of the town in 2012.
The short video above shows me playing a slippery slide with a bow, a technique first shown to me by Alan Lamb when we worked together as part of the 2006 Unsound Festival.
Bowing the slide sounds very much like bowing 'the wires' -- except for the length of the decaying note. The video linked in the preceding sentence reminds me that my partner Jo is much better at bowing than me.
Aside from adapting Alan's technique for a slippery slide, I've been experimenting with changing the pitch while playing by adjusting the tension on the line. The other source of variation in the sound comes from the friction of the bow, which can squeal like a harmonic.