Sounds interesting.

I'd like to hear what tech gurus say about the safety of this procedure.

Somnoplasty procedure info

What is the maximum permissible exposure of temperature controlled RF energy on the head (tongue area)? What is the time-average of RF exposure?

( . . . the tongue is awfully close to the brain . . . .)

Somnoplasty procedure details:
radiofrequency signal around 456kHz
1 to 10 watts power level
80 volts
generates heat at temperatures between 65 C (149 F) and 95 C (203 F) with tissue temperatures of less than 100°C
5 to 10 minutes of RF energy delivery

I don't know much about this, but I would only do this procedure under 7 watts. I think ANSI guideline for RF safety mentioned something about 7 watts and less not being so dangerous.