Protection of DHTML Code

With the explosion in interest of Rich Web Applications and feasible support technologies (JSON and JSON-RPC, for example), more and more applications will be done in JavaScript. JavaScript code is in the clear by default. For open source products this is not an issue. For closed source ones, there is a need for scrambling JavaScript code. I remember Oddpost (built an Outlook clone in DHTML for IE and acquired by Yahoo in 2004) used very convoluted ways to hide their JavaScript source. There should be some framework support for it.