Maybe they're negotiating a deal with one of those companies?
* Presumably they need to integrate with their backend systems for reporting, inventory and tax purposes.
* They need to integrate with their customer support system so bitcoin payments are recognized as such.
* They have to update their refund policy and other legal docs to take bitcoin payments into account
It's not just about making the right API call, you know.
The project is in an early stage, with no decision yet on whether Overstock.com OSTK would work with bitcoin companies to allow bitcoin payments or create its own system. A team of six to 12 people is expected to work on bitcoin payments at the company, said Byrne.
http://blogs.marketwatch.com/thetell/2013/12/19/overstock-co...
It doesn't sound like they have quite figured out what they are doing yet.
See this NY Times article from 10/31/2013: http://www.nytimes.com/2013/10/31/technology/bitcoin-pursues...