I'm in the preliminary research stages of building a series of stock tools that allow users to do arbitrary searches on the intarwebs and then correlate the data with historical price data on equities. I registered tinystocktools.com but nothing is up there yet as I'm just tinkering with what sort of free API's I have available to me at the moment before I start seriously building it.
There will be social aspects to it but I'm so tired of "social" being the main focus so it's definitely going to be more of a research/monitoring tool that begrudgingly lets you tap into your FB and twitter networks as part of it.
There will be a consumer-facing interface but I'd also like to create a nice streamlined API so people can leverage my platform as well.