LED is the only technology with any real promise, but the cost has to come down to 1/10th what it is today before they will be accepted by people on a budget.
I agree that LED bulbs are priced beyond the means of people with limited resources. But as they become more popular the price will come down, just as it has with CFLs.
Until very recently I was one of those who swore my government would pry my incandescent light bulbs out of my cold dead hands. I love the light that incandescents give off, and I hate the flicker, noise, and unreliability I've experienced from those tools of the devil called CFLs. (Not to mention the mercury...)
Then just a couple of months I discovered the Philips dimmable soft white LED lights - 15 bucks at Home Despot here in Canada, but currently being sold for 10 dollars, courtesy of in-store 5 dollar coupons with the discount applied at the checkout. Obviously I have no read yet on their longevity and reliability, but I can attest to the fact that they have no visible flicker. (I have nystagmus, and am bothered by flicker that others can't even perceive, so I tend to be a good judge of flicker in light sources such as car LED tail lights). I only hear a very faint buzzing when I put my ear close to the bulb, and I am unable to distinguish between the light given off by these LED bulbs and the cheap incandescent bulbs I've always used. Still a lot more expensive than an incandescent bulb, but it has a 6 year warranty that makes me feel a little better about the price, and at less than 1/5 the power consumption of an equivalent incandescent, so far I'm pretty happy with them. These are the best alternatives to 'tungsten in a jar' that I've come across.