Link to css files instead of less in local.xml
Quick LessPHP compiler.

Just add this line:
    require_once '../utils/lessc/compiler.php';

Inside index.php:
if (isset($_SERVER['MAGE_IS_DEVELOPER_MODE'])) {
    Mage::setIsDeveloperMode(true);
    require_once '../utils/lessc/compiler.php';
}

Then enable "Developer Mod" in .htaccess:
    SetEnv MAGE_IS_DEVELOPER_MODE