Sometimes Bitcoin isn’t an option in your store. What gives?
Affected products include domains and themes when not purchased in bundles, and any purchases made while you have credits already on account. We’re sorry! There are some technical complications. We decided to go now with what we have because, as we said at the beginning, this launch is about enabling people. Bitcoin should be accepted for all purchases within two or three months. http://en.blog.wordpress.com/2012/11/15/pay-another-way-bitcoin/