I read about that yesterday. Bitcoin is really catching on. A lot of major businesses are starting to accept it.
I still don't believe in investing in it though. Although I may implement bitcoin payments for my business next year. It depends on the demand. So far my customers are happy using Paypal and no one has asked for an alternative method of payment. Perhaps I should just ask.
Anyway, back on topic, if Visa is connected to bitcoins I'm sure it won't be long before Mastercard jumps in. I'm wondering about American Express though. They're very finicky about who they do business with. That doesn't mean they won't jump on Bitcoin. Just means that they're snobby so I wouldn't be surprised if they didn't.