Engineer and farmer Paul Wheaton and his team behind the Permaculture suite of sites and forums is one of the resource links here.
Among much else they investigate light bulb issues, interestingly being against the light bulb ban from environmental as well as other reasons (unlike many of their green colleagues).
Of the podcasts, one from a few days ago covers his ongoing lifespan comparisons and can be listened to here (mp3 download)
Paul Wheaton talks with Jocelyn Campbell about the CFL experiment he is working on. All the incandescents are still going, one CFL out of 3 is still going, and the LED is still going. He talks a bit about LEDs, and some concerns people have about them.
A good recent summary of Paul's position on the light bulb issue, in particular criticising how CFLs are promoted, can be seen here.
An earlier longer article on the topic: CFL Fluorescent Light Bulbs: More Hype Than Value