Few months ago, Flickr removed PayPal as a payment method and only those Flickr members could upgrade to a Flickr Pro account who had a Credit Card.
This was met with a great deal of disappointment in the Flickr community as existing Pro members, who were not having credit cards, could not renew their yearly Flickr pro membership.
Well, the news is that PayPal will make a comeback on November 20, 2007.
However, PayPal will now be offered as payment option in Flickr via Yahoo! Wallet. Flickr will also provide local currency support for payments made my PayPal. Full thread here.