I bought myself a type B after some inspiration from DarkTher4pys Garage Door project and his video showing sky box control over UPnP.
After receiving my Pi today and the nightmare of setting up wlan I was surprised how easy this was!
My implementation differs to DarkTher4py's in that I'm parsing channel names and mapping them to the sky guide using the geolocation information Siri sends with each request.
This means when I ask for BBC1 it takes me to BBC North channel 101 for me, rather than the default London.
Further development will link in ratings for Rotten Tomato etc.
"Siri find me a film showing tonight with a good rating on rotten tomatoes"
I should also be able to fetch the current channel from the sky box and enable contextual search such as... Who plays the lead character? and Who directed this programme?