Opera Mini does this. Their servers would render the page for you and ship the result to your phone in an optimized, compressed form. It also supports basic Jav

Opera Mini does this. Their servers would render the page for you and ship the result to your phone in an optimized, compressed form. It also supports basic JavaScript-based interactions, where the server would execute the JavaScript for you once you interact with an element (with a short deadline, something like 5 seconds) and send you the diff when it's done. You could even use fairly complex, modern web-apps on old feature phones this way.