There is. Whynot.net. And, I guess, halfbakery has been around doing sort of the same thing.
It seems, though, that you could pick up the Tuesday Times and a half-dozen or so innovative new ideas on science and technology. Maybe it's too slow to read a 2000 word article, sift through the descriptions and whatnot... So this site just has one-line ideas: "Have the third brake light indicate degree of deceleration" or "put a GPS-stamp in a camera" (both ideas which have been pursued elsewhere...).
Is it progress towards Open Source Everywhere (there's a manifesto out there you can link to)? Or is it more, I suspect, the slimming down of extraneous content, down to the meat. My thesis abstract is boiled down from 200 pages to a few paragraphs, essentially with a footnote saying "I've got some proof." Those interested can read further... Those ready to comment and opine and adapt, however, can go right ahead on whynot.net.