David Marcus, president of PayPal, says that he is considering the possibility of supporting Bitcoin as a PayPal funding instrument in the future:

(skip to 2:50 in the video for the Bitcoin comments)

A transcript of Marcus’s response:

So I’ve been spending a lot of time looking at [Bitcoin], and it’s truly fascinating actually: the way that the currency’s been designed, and the way that inflation is built in to pay for miners, and all that is truly fascinating. I think that for us at PayPal, it’s just a question whether Bitcoin will make its way to PayPal’s funding instrument or not. We’re kinda thinking about it.