1) As per a quote in one of the Wikipedia deletion votes, they are a pirate running either 250W or 1kW (not likely, else a Google search would have turned up angry hams and a mention or two in NERW)
2) As per other Wikipedia comments and vague details on wbxo.com, they are a Part 15 unlicensed FM running 0.1W from a mountaintop, and might-maybe-kinda-sorta reach out for a mile or two (rather likely - I'd bet they're a "reformed pirate" that dropped their power after the FCC got too close for comfort, or perhaps a quasi-pirate running just outside the Part 15 restrictions)
If the FCC measured a field strength of 2,791mV/m @ 644m then they were probably only running 7 watts. Maybe more depending on how long of a coax run they had, connector loss, etc, or maybe less if they had a kick ass antenna. Definitely not 250W. They could have just been running on exciter power when the FCC took their readings and crank up an amp at other times. Either way, hams would generally care less unless the broadcast band pirate had a dirty transmitter, as in not spectrally clean. The only harmonic of 102.5MHz that lies within a ham band is the 9th order harmonic in the 33cm band and it is so many dB down from the primary output power that it wouldn't be heard beyond a few dozen feet from the transmitter. It may mix with a transmitter in the low VHF band to create intermod, but still, ham interference would be very minimal unless the people who built the transmitter's filtering sections were idiots.
Legal limit for Part 15 in the FM broadcast band is much lower than 0.1W. You're allowed a field strength of 250mV at a distance of 3 meters. Transmitting into a 0dBd gain antenna with no feed line loss you would only need to transmit .0000012 Watts. A whole 1.2 MICROwatts. That's why the FM transmitters built into satellite radios and that you buy for MP3 players only manage to transmit a dozen feet.
