configurable swatches magento 1.9.1, make first option selected by default -- BETA -- not for production, you will need to make slight mods.

spConfigIndex.js

function fireEvent(element,event)
{
	if (document.createEventObject)
	{
		// dispatch for IE
		var evt = document.createEventObject();
		return element.fireEvent('on'+event,evt);
	}
	else
	{
		// dispatch for firefox + others
		var evt = document.createEvent("HTMLEvents");
		evt.initEvent(event, true, true );
		return !element.dispatchEvent(evt);
	}
}
 
function setDefaultConfigOptions()
{
	if (spConfigIndex >= spConfig.settings.length)
	{
		return; // stop
	}
 
	spConfig.settings[spConfigIndex].selectedIndex = 1;
	var obj = spConfig.settings[spConfigIndex];
 
	++spConfigIndex;
 
	Event.observe(obj,'change',function(){});
	fireEvent(obj,'change');
 
	window.setTimeout("setDefaultConfigOptions()", 1); // Add a small delay before moving onto the next option
}
 
var spConfigIndex = 0;
Event.observe(window, 'load', function() {
	setDefaultConfigOptions();
});