There are two excellent ideas in this posting on ZDnet, aside from the observation that you can scale Ruby on Rails if you avoid hitting the disk farm for static content:
1) Have a team devoted to rapid scalable prototyping. (LinkedIn Light Engineering Development)
2) Use free apps for both proof of concept testing and marketing.
Read and enjoy.
Ruby on Rails: scaling to 1 billion page views per month by ZDNet‘s Dennis Howlett — While a lot of attention has been focused on Twitter with questions about whether Ruby on Rails scales, LinkedIn has been quietly running a RoR application on Facebook that is beating down around 1 billion page view per month. Bumpersticker, a relatively trivial Facebook application that allows you to create a cartoon that you can […]