Didiom is a new service that may interest music fans who want to stream songs and iTunes playlists stored on a PC on to their cell phone over the Internet, for free.
Didiom works like this: you download a desktop application (no Mac support yet) and select folders containing audio files that you want to listen on your mobile phone.
Next install the Didiom app on your phone and once authenticated, you can browse music libraries on your computer and listen them on your phone wirelessly anywhere as long as the phone and the desktop are connected to the Internet.
Didiom is available for most smartphones including BlackBerry and Windows Mobile devices. It can also stream music arranged in your your iTunes music library.