I'm that guy who quit his job. Here's a web-app I made.
http://nwtronix.com/life/index.html
It's been done in a very short period of time to scratch my own itch: a usable life expectancy calculator, preferably one where you don't have to fill ALL THE FIELDS.
I had first mockups in Illustrator and JS engine done within two days. Another four days were spent on slacking off and bringing design + functionality together.
It uses jQuery UI too.
What do you guys think? Good start. Go from there. Also see: http://www.wolframalpha.com/input/?i=life+expectancy+male+bo... This has potential, but only if you ask more specific questions about specific diseases one has. So I'm going to live till I'm at least 68 or possibly 80 ... too loose and broad a set of generalisations. Anyone today in the west can be pretty sure of living to at least 68 (barring accidents) and possibly as much as 80 if you don't have heart disease and clogged arteries or are not morbidly obese. I've seen recent data suggest that people who are slightly overweight and are still comfortable (i.e. they are not restricted by it) actually seem to live longer on average. I could have guessed this much myself.