More than 30 companies are gathering on Friday, Oct. 2, in NYC to discuss Hadoop, the secret sauce that makes it simple to manage massive amounts of data. Amazon, Facebook and Yahoo are giving talks at Hadoop World. Talks at Hadoop World span a wide range of users — from enterprises considering Hadoop to experienced users looking for more intensive instruction. In addition to the big web companies, VISA and JPMorganChase will discuss use of Hadoop in the financial industry while China Mobile will talk about use in telecom. GigaOM readers get a 25 percent discount through Sept. 25. Click here to register.