http://betaknowledge.tumblr.com/ as a compilation of weak signals about the future
Btw, I started a tumblr few days ago to accumulate insights, data points and "weak signals" in a very basic/raw way... I use to put that material into delicious but I'm not satisfied with the service anymore. It's called beta knowledge and it can be seen as material that can be turned into long posts here on Pasta and Vinegar, in articles/books/reports, or, even better, into design objects.
I'm trying to integrate that into the feedburner RSS feed.