I was thinking of using several pieces as a solution to the stink removal + humidity removal + lighting control.
1) A z-wave enabled switch, like Aeon Labs Touch Panel. Maybe two, one for a light and one for a fan.
2) A motion sensor/humidity sensor, like Aeon Labs Multi-Sensor.
3) An in-box/in-wall z-wave switch like Aeon Labs Micro Smart Energy Switch, or two of these.
One touch panel could be used as a manual trigger for a light, the other for a fan for stink removal (timed or not).
The motion sensor could trigger the energy switch controlling the light, on and off.
The humidity sensor could be used to trigger the energy switch controlling the fan.
The only problem is that this won't currently work with the A+ as multi-sensors aren't fully supported and neither are scenes and events. Another problem is that this is an expensive solution.
I'm waiting on parts to build my own solution based on a MySensors.org enabled gateway and sensors, substituting NRF24L01+ transceivers for the z-wave communications. It should be considerably cheaper than ~$160 in z-wave parts and everything will work out of the gate whereas we're waiting on z-wave sensor support and more robust HA support from the A+, like scenes and events.
I'd like to hear from the crowd any solutions that would actually work with the A+.