1. Powerful servers with lots of space.
2. Fast connection. Better than T3.
3. People willing to listen.
Hopefully your buddy is paying attention to all the radio sites that are being required to pay copywrite taxes by the record industry GreedEO's in excess of $50,000 in most situations.
This tariff has been held of by the courts, but it will more than likely comeback as the RIAA and their fellow moneymongers plead their piracy case.
The last thing your buddy wants is to drop $100,000 on servers and bandwidth, only to end up getting shut down due to not being able to pay the RIAA tariff.