While I've never been on Oprah, I have had my startup featured (~8 min. segment) on a show on the CBC (Canada's national broadcaster.) Hardly a blip in load.

While I've never been on Oprah, I have had my startup featured (~8 min. segment) on a show on the CBC (Canada's national broadcaster.) Hardly a blip in load. We had a few more emails than usual offering "advice," though. That said, it sounds like a good excuse to take a good look at your caching, landing pages, and conversion funnel. And, if you are worried about needing to scale fast, consider something like chef for automating infrastructure setup, so that even if you don't need it for Oprah, it's work that you'll use when you do need to scale.