No I'm not, just sitting here in front of my Mac.
Okay, sorry but that's the fun of this forum; jumping from discipline to discipline.

Thanks for the explanations Duane, it's all very plausible the way you explain it, although I still don't see a reason why the moons of Saturn don't show Io's features. Saturn also has a Roche limit and both systems have moons orbiting inside and probably very close to this limit (which is of course a mathematical approach that is based on the assumed mass of the objects).
Wait, I'll just sum up the questions:

1. How much would the resonance factor add to the heating
2. How much would the the spin add to the heating
3. What gets heated, the crust or something deeper inside and why?
4. Why would size matter for the release of the heat
5. What are all those tiny moons doing inside the Roche limits

Well let's leave it at that for now, I hope you're not tired of explaining yet.
Cheers.