Did someone found a solution to control a Sonos system ?

Not sure what you are expecting here Sonos cannot be controlled via IR, serial or wireless, so I guess you are asking whether you can use the Pronto as a web browser to control the Sonos using one of the few third party web based sonos controllers - I would suggest that will be a very messy solution.

Only option to me would be to write a dedicated web based application that suits the sonos and pronto, but that is not a small task!

I did hear that Philips were working on an interface, however that was quite a few months ago and I've heard nothing since!?

Sonos interface now available contact your local Sonos or Pronto Reseller :-)

www.avd.com.au