Ask HN: Forum/site for "unused" startup ideas?

I'm not one to share ideas for startups that I deem good and may eventually pursue. I might solicit friends for advice, of course. But, for the most part, I keep them as secret. I keep them in a simple txt document, which I add to whenever a new, decent, usable idea comes to mind.

Usable, however, is the key word. I don't include ideas that are outside of my domain, or which I won't ever likely pursue. And so many ideas go all for naught. I can't "use" certain ideas, so I don't record them - and no one uses them.

So, question #1: What do you think about a forum or community site where HN users (and, eventually, everyone) could post good (but for them, unfeasible) ideas for others to use? (This thread could be the starting point, of course.

Now, question #2: Would any of you like to help develop the site? I own everstretch.com, which we could use - a place to stretch ideas.

And, finally, here are my first two ideas - one radical, one more conventional. 1) Caloric Intake Tracker - I'm not sure if this is at all possible, but I would use it everyday for the rest of my life (and happily pay a monthly subscription), if it were created. Instead of having to log in and estimate daily intake, this product might be a wristband, or a chip, or whatever, and would physically check to see a person's energy balance. It might even be a pill to swallow, once a day, or week, or more.

2) Twitter "Get to a TV" Score Updates - I follow many sports teams. But I don't always watch them live. At the same time, I hate missing those close, intense, sometimes epic games. So, this idea would be a website where (1) a user can select which team to track closely, and (2) whenever that team was in a game, and the game was very close in the final minutes, it would tweet a DM notification to "Get to a TV."

Cheers.