Ok - Awesome idea and project. I just tested it out and it worked great but I did have one bit of feedback.
To make it more realistic, you should let the call run a bit longer. For example, on my phone with the volume up in a quiet room you can hear the beep when the call ends. With this service the call ends quite abruptly. Perhaps let it run for a few seconds though I am not sure if this would incur any cost on your side?
Yeah at the wrong companies it does definitely. You can bullshit your way in/out of anything, especially in big companies. Just find another job if that happens; if you are really smart and competent, there will be no problem finding something which does fit. Don't stick with elbowing morons, ever.
I would assume you could tune or adjust your interests over time, similar to any other user specific preferences.
To your second point it is merely a matter or design choice. Does "funding stories as a whole" trump your more specific interest of Facebook IPO or does your specific interest in Facebook's IPO trump your desire to opt out of the funding stories as a whole.
The problem I see is making such a system intuitive to your user base and clear. It seems the more complex the system is the more complex the user preferences become.
Care to elaborate on what it is? At work we looked at Yammer, some people use it and others don't. However, my impression awhile back was "great another facebook but for work". (I mean no offense to it, I am honestly interested in how you view yammer.)
I can say from watching my father do this while I grew up that this is extremely unhealthy on the body. Sure you can do it, sure you can recharge every few many months but this will not work out in the long run. By that I mean accidents are looming when you live with this little sleep regularly. Trust me on this before its too late to say I wish I would have slept more.
There is strong evidence that links sleep deprivation over time, even minor, to long term health problems.
As someone who cut sleep for years (6 hours was normal in twenties and much of thirties), I can attest that at some point, it becomes difficult to operate on less sleep. If all of your coping strategies involve putting in more time (essentially at the expense of sleep), when you can no longer cut the sleep, you may be in a bind when that is no longer the corner that can be cut. Though not always, that point in time often coincides with when your parental commitments are at their peek as well, and as a parent, you probably shouldn't cut that corner. So what then...
Something like the Pomodoro method helped me alot.