adding default txt to the post box?

Sure, open up the file functions.php in your theme folder and add the following code:

function my_default_post($content)
{
	if (empty($content))
		$content = "Your default text";
	return $content;
}

add_filter('the_editor_content', 'my_default_post');

Obviously you want to change the “Your Default Text” to whatever text you want, but you get the idea.

You could also add this code to your wp-config.php, then it will work for any theme you use. I don’t suggest adding stuff like this to the config but at it will work. If you want, I can turn this into a plugin later, but not sure how many other people would want it.

Any other features a plugin like this would need?

I add my thanks, that was something I really needed, thanks a lot 🙂