I have now managed to access the radioio internet radio streams from my Hifidelio - although some of the radioio streams appear under the internet radio listings they do not seem to work. What I did was use my Squeezebox to access the radioioBeat stream and then make a note of the URL - in this case it is
http://radioio.sc.llnwd.net:8615 and entered it as a custom station. You need to make sure that you register with radioio in order to access the 128Kbps streams - the default radioio streams don't have a useable URL.
- Simon.