As much as I like to push the envelope, I'm going to go out on a leg here and suggest Ruby on Rails. I love it, a lot of people love it, that makes it easy to l

As much as I like to push the envelope, I'm going to go out on a leg here and suggest Ruby on Rails. I love it, a lot of people love it, that makes it easy to learn and deploy. Also with Passenger, it scales out just as easily as any framework or language out there. And if you need to jump to multiple servers, you ought to be making enough money to support Engine Yard which solves your scaling problems for you.