Most of our room lighting is now based on my own LED drivers, which take DC from a switching power supply, and then do current-dimming (via a high-frequency switching regulator) of the LED. Fully dimmable, zero perceptible flicker, very little (>200kHz) ripple measurable at the LED with an oscilloscope, and barakta-approved.
I found some 7W LED lamps from Wilko that do a proper job (as long as the mains voltage stays in spec, see rants passim) of smoothing, which is fine for the bathroom. We also found some (DC-powered, via a wall-wart) desk lamps that PWM dim in the 50kHz range, which barakta can't percieve. It's just the kitchen that's a bit of a compromise, as we're stuck with a big bright CFL in the landlord's crappy fitting in order to see the muck amongst the dinge.
Then there's the challenge of display devices. Most computer LCD displays PWM dim their backlight in the 200-400Hz range, which is headache-inducing. Multiplexed LED displays exhibit all sorts of exciting artifacts, but they're less of a problem as barakta doesn't spend much time staring at them. A recent annoyance is our new kettle, which has a nice bright BLUE! LED ring of yes-I'm-on-ness (which is more useful when you can't hear it boiling), but appears to be driven by a half-wave rectifier. I need to dig the security bits out and see how much space there is for modifications...