The future of lighting? LED 9-watt bulbs are said to last throughout 10 years of continuous use and produce the same luminance as a 13-watt CFL bulb.
However, follow the link above and you'll see that the bulbs sell for $70-$80, making them non-competitive currently in the high efficiency light bulb market.
The design of the bulb provides 360-degree lighting, making them great for lighting an entire space with, say, a large floor lamp. And 100,000 hours of dependable use makes them attractive even when comparing them with CFL's, which have long lifespans but often burn out prematurely.
There's a great post on the LED 9-watt bulb over at Treehugger, with lots of insightful comments. Anyone have experience with this bulb type?