In addition to confirming the company's inability to meet the demand for its new video cards, AMD's CEO Dirk Meyer said he "expects that situation to improve over the coming weeks and months." Unfortunately, he didn't say whether or not the lack of supply is related to manufacturing troubles -- nor was there mention of a short-term strategy to churn out more 5000-series cards.
For now, it seems you'll have to hunt for a Radeon HD 5850 or 5870 if you want one. At this point in time, ZipZoomFly has one 5850 card and two 5870 models available. Should you happen to see them in stock elsewhere, please leave a comment to inform others.