We successfully played radioSOMD.fm on an iPhone today. All you need is a $7 application from the iTunes Store called WunderRadio.
We are not yet listed in their pre-programmed station directory, so for the time being you need to specify the stream URL of http://somd.com/radio/radiosomd.pls
Our Police & Fire scanners are already listed in their directory.
Wunder Radio is also available for Windows Mobile and the iPod Touch.
More information is available on their website at www.wunderradio.com.
There are also other Internet Radio apps available for iPhone, but we have not tested them. One is Tuner Internet Radio from Nullriver, Inc. for $5.99. More info is available on their website.