A few years back I wrote a scraper for 13f and 13g filings. There was no standard format requirement at the time (is there now?) so it was an 80/20 hack with the remaining 20% completed via Mechanical Turk. Not sure what became of the project, but it seemed like there was a menupages-style opportunity to monetize the cleaned up data. Glad someone actually went ahead and did it!

To the MarketBrief guys: are you using anything cool (machine learning?) to clean up historical data?