I signed up with an account with them yesterday to check them out. The "accepting" Bitcoins thing is pretty useless. Although yes you can send Bitcoins to your OKPAY account, but thats about all you can do with it. You cannot exchange Bitcoins for any other currency on their site, you can't fund a Debit Card with them or buy USD or EUR with them, basically the full extent is I suppose you could use them for some type of online wallet but thats it. In that respect I "accept" Bitcoins too but I don't see anyone getting excited about that.
Someone in another thread managed to exchange for dollars
They received an exchange rate of $1.65 for 1 bitcoin.https://bitcointalk.org/index.php?topic=51403.0
I opened an account and sent 1 bitcoin. They advertise 0% commission, but based on the MtGox pricing of 2.95, they are taking about 30 cents.
also, it looks like once you have a balance > $15 you can order the debit Mastercard through the mail. You can reload the balance anytime and shop with it anywhere Mastercard is accepted.
So yes, I suppose now you can spend your bitcoins anywhere Mastercard is accepted. But it's much more expensive for you, and the normal debit fees apply for the merchants. But, if you have alot of bitcoins and you want to cash them out quickly, sure put them onto a debit Mastercard and go shopping!
Interestingly anyone with $1000 can set themselves up on their site as a currency exchange.https://www.okpay.com/en/support/faq.html
It may be a way for anyone to easily buy and sell bitcoins.