I haven't, but they sound interesting now that I know what they are. Mind you, my skills as a (non-computer) hardware geek are pretty weak.
Of course, I work seriously weird hours, so....
EDIT: Ouch. My ~4PM-whenever workdays are seriously incompatible with all the public meetings I see on HeatSync's page. Don't they ever have stuff on the weekends?
In all honesty, cox was the only choice for me for a long time. I think qwest only started offering DSL in my area very very recently.