I'm posting this because of the people who didn't believe me. You know who you are.
According to an article that happened to find its way into my email, scientists have found and modified a particular bug protein so as to use it for data storage. Apparently, a LOT of storage.
The article estimates commercially available USB drives available a year from when it was written, but it's been almost a year and doesn't seem to be mainstream yet.
I'll keep my fingers crossed.