I got it working on my MCI500H by copying the HTTP Live Streaming URL (accessed from SWYH through Tools>HTTP Live Streaming).
I then went into my Streamium Management at https://secure.philips.co.uk/myphilips/registeredProducts.jsp and clicked on the “Go To” link under “My Media”. I pasted the HTTP Live Streaming URL in the URL field and set the Mimetype in accordance with your SWYH settings (i.e. MP3 or PCM/L16) and set the description and nickname to “Stream What You Hear”.
Start playing something through your PC with SWYH running. On the MCI500H, go to Internet Radio>Favourites and then select Stream What You Hear. It should start playing. Mute your PC so you don’t hear the delay.
Hope that helps!