They are cache specialist trading at $21

So we know FB is using one these servers:

http://www.fusionio.com/partners/

Also, wonder if we can affect/outdo this because we know we can and probably will work within this because we're only limited by the processors ability :

The ioMemory Solution

Fusion-io was founded in 2006 when its founders recognized that spinning disk-era storage could no longer keep up with modern data demands. With experience in transaction processing, high-performance networking, storage, superclusters, and computing and image processing, the Fusion-io management team recognized that mechanical disk-based storage architectures do not keep pace with advances in digital processing power. This meant that despite major advances in technology, even solid-state disks (SSDs) are limited by the access methods of legacy storage infrastructures. To overcome these limitations, Fusion ioMemory was architected as a high capacity, persistent memory platform for application acceleration.

With its ioMemory software, Fusion-io gives servers native access to data to accelerate the applications we depend on today, from banking, social media, retail, transportation, healthcare, security, entertainment, research and development, and more, all with a solution that allows enterprises to significantly reduce complex and expensive storage sprawl. In addition to accelerating applications, Fusion’s storage memory platform also reduces energy consumption and total cost of ownership. For more background on customer results with ioMemory, please visit our case studies or contact us at sales@fusionio.com''

e