Half the tools on the web shred whitespace. Being whitespace-sensitive is going to make it painful to talk about your language and hinder adoption, unless there's a more robust yet readable syntax that's trivial to convert to and from.<p>Also, the framework is not producing progressive enhancement markup or running js on your server. "Write this:" on <a href="http://opalang.org/" rel="nofollow">http://opalang.org/</a> is an empty div, and <a href="http://chat.opalang.org/" rel="nofollow">http://chat.opalang.org/</a> has no form to submit and does nothing. Sorry, I simply couldn't use it in its current state.