Actually it's the opposite, Cappuccino applications are mostly client-side, running on JavaScript. Objective-J is an extension to JavaScript, which gets compiled to JavaScript (either at runtime or ahead of time).
ok. ok. i misunderstood.
interesting. so why wouldn't i just write javascript? what is the value added? aside from the fact that i'm not coding in javascript (which i don't consider a negative)
JavaScript lacks several features useful in programming complex applications, namely classical inheritance, code importing, dynamic message dispatching. Objective-J adds these to JavaScript, but of course you still get all the features of JavaScript, since it's a superset of the language.
Any HTTP server. The runtime compilation takes place in the browser (the compiler is written in JavaScript). The pre-compilation uses a command line version of the compiler running in Rhino)