[ultrasaurus]

Although it's safe to assume you won't have scalability problems right out of the gate either.

Once you have tens of thousands of hits a week presumably you can port to HipHop yourself ( http://github.com/facebook/hiphop-php ). Needing to scale is a great problem to have.

[robertross]

I completely agree, the best problem in the web world. That's why I'm trying to think of it now because I open the doors to a project I'm developing for myself.

What about the projects that use PHP extensions in the .ini to speed things up (such as http://pecl.php.net/package/APC)