I was initially very excited but once you read the details it's the spec and implementation of the API for a realtime market data messaging system that is public and MIT licenced (unlike Bloomberg's competitors) not any actual data sources.

Presumably even if you want to test a new client implementation, you would need to have an account with Bloomberg (the magazine article mentions "beta" markets but I'm guessing that doesn't mean in finance what it means to developers).

THere are alot of restrictions on what you can do with financial data in general.

Typically it's tiered pricing model so it's:

- at one rate for viewing internally at your company,

- another rate if it's used for automated trading purposes

-another, open your wallet and dump it out price if you want to redistribute the data to external viewers, ie put it up on a website.

I haven't looked at the license yet, but I suspect it may have certain restrictions with regards to providing the data to others without becoming a paying customer.