From Reddit:
Note: The OB team has not yet released OB for Mainnet and they strongly recommend we all just hold our horses until it's been thoroughly testedThat said, a couple of us were impatient

This morning Shayan Eskandari and I decided to bootstrap a Mainnet and I would purchase keychains from him. Sam and Brian joined in to sell stuff as well (it's their project after all).
At about 3PM PST we performed the first live transactions on the OpenBazaar Mainnet with version 1.0. I purchased:
3 SuperBitcoiner keychains from Shayan
2 sets of 2 OpenBazaar pins from Sam
1 can of RedBull from Brian (lol)
Shayan subsequently purchased pins from Sam as well.
The transactions went flawlessly. All 3 parties received their real bitcoins and will be shipping the products to me shortly.
For fun, here is the Ricardian Contract for the pins I bought from Sam:
https://gist.github.com/tyler-smith/38bac0fb1bf9a5c478b6Here's an album of a few screenshots I took of the listings I purchased and the resulting completed orders:
http://imgur.com/r9l7Xit,UnPXYLn,HvW3ylS,5iVBvhH,ohgkqcaThere's still a lot more testing to do to feel confident, but so far things are going great! Good work OB team!
https://www.reddit.com/r/OpenBazaar/comments/48w17f/impatient_testing_first_mainnet_transactions/