We just finished implementing an automated deployment process that will build nightly "binaries" of the Solidity compiler targeted at the emscripten platform and push them onto github-pages. Furthermore, old binaries will be retained and you can now dynamically switch the version you want to use at https://chriseth.github.io/browser-solidity So, https://chriseth.github.io/browser-solidity will now provide you with a cutting-edge "nightly" version of Solidity plus the ability to go back to more stable versions and even verify the source code of deployed contracts compiled with a specific version of Solidity using the "runtime bytecode" output in the "details" tab.