The program was first born has "Playlist DJ" for Nokia, but didn't get to be a success until it was reborn as an Iphone app called "moodagent" in December.
300k iPhone users downloaded in 3 weeks and about 400k Nokia users. The daily rate is about 20k dl.
The founders think they'll reach 10mio before 2010 ends.
Their business model is this : about 3$/user/year in ad income shown in a small window in the application. Besides founders Peter Berg Steffensen and Mikael Henderson the investors include the it-investor Morten Lund.
(if you can read the gibberish called Danish , the source is here : http://epn.dk/teknologi2/tele/article1945005.ece )