Too bad the EffectCheck API is not open for all. Looks like a well-parameterized sentiment analysis tool.
What does this page tell us: http://effectcheck.com/pricing
It can be used for a stock analysis and dampening or amplification caused from other firehose like sources like Twitter.
It hopefully tells you that we're happy to work with you if you'd like to use sentiment analysis or lexical impact analysis in your company. :)
We are focused on B2B applications of our technology rather than the consumer/API side. However, if you have a cool idea for how you'd like to use EffectCheck, email me [1] and I'll be happy to discuss it with you.
It can be used for a stock analysis and dampening or amplification caused from other firehose like sources like Twitter.