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Pandora, the customized Internet radio streaming service, has pushed out a redesigned interface to all users. The new UI comes with an added bonus: the company has removed its infamous 40 hour listening cap, enabling users to streaming an unlimited amount of music for free.

The Web interface for the popular music service has been totally overhauled, offering a sleeker, cleaner design with simplified controls. The top of the page contains iTunes-esque controls for playing, pausing and skipping songs, as well as voting them up or down. From the same toolbar, users can type in the name of any artist, composer or song to automatically generate a radio station based on their musical preferences.

A report on Reuters claims that 2008 was a breakthrough year for radio on the Web, with a proliferation of new web and mobile apps for radio. The report states that Clear Channel has "long led the way" with innovative Web programing such as its "Stripped" concert series and "New" artist spotlight program, but also big companies such as CBS and AOL have contributed to the growth in online radio.

We think it's CBS Radio and not Clear Channel which has made the biggest strides. CBS' partnerships with AOL and Yahoo!, along with its ownership of trendy online radio app last.fm, have effectively made CBS Radio the most powerful force in Internet radio in 2008.