Hi,
I worked a lot 3 years back in Icecast to manage playlist for ondemand music system. I even customized IceCast to make realtime reporting and royalty calculation system. I can handle this and can developed PHP/mySQL based Icecast Manager System for you.
Please share me more details about your current system, I assume you already have some systems, songs DB and library of Music.
Thanks & Regards
Sandeep Verma