But it is BIG FAIL. It is available only on US site. On international site this type of payment is not available. This is again one of basic ideas of cryptocurrencies - worldwide, borderless!!!!
Ah thats why I could not find the BTC option on check out
But I guess they will add that soon....I mean I see no reason why they should just accept BTC for US?
Edit: Found that statment on reddit.com: "For now it's only available on the U.S. checkout but I hear from reliable sources that they will roll it out to international after a bake in period."
(sorce: http://www.reddit.com/r/Bitcoin/comments/1utcz6/bitcoin_payments_are_now_live_on_overstockcom/ )