I've lately spent a lot of time trudging through 10-K's and financial data, so this is really cool! I've almost made this exact service myself on a number of occasions but stopped due to the unreliability of XBRL, which meant that even if I had a sweet API I'd still have to go back and double-check the numbers by hand.
For me, Excel integration with products like CapIQ is good enough -- for now.
For me, Excel integration with products like CapIQ is good enough -- for now.