At first blush, the first iteration of the board - with just under 5 watts of dissipation does make an Intelliflow turn on. You have to give it time to turn off, though. Even unplugging the 5 volt wall wart doesn't make the power turn off right away. I believe this is because newer Intelliflows have a 15 minute timeout before they turn off.
~5 watts of dissipation, however, makes for a great deal of heat (and, of course, wasted energy). I am going to try to remove some of the resistors to see if the unit remains reliable without getting so hot.
Wow, it turns out two watts is enough. Who knew the Intelliflow was so sensitive? Well, now it looks like even 5 watts isn't reliable. Going to have to do more work.