Not touch screen but....
My suggestion would be to do the following:
1) Download and install SqueezeCenter on the PC from
http://www.slimdevices.com/su_downloads.html
2) Purchase a Squeezebox Duet (Controller alone or the Controller+Receiver pack) - see
https://www.ripcaster.co.uk/node/282
3) Connect the Duet Receiver to your multi-room amp (or use the free SoftSqueeze application to output via the PC sound card if you only have the Duet Controller).
4) You will then be able to control the music using the Duet Controller throughout your home (within WiFi range).
Hope that helps -
ripcaster
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