And the Magic Function is...

document.write(). Writes directly to the DOM where ever the script is. That's how you embed javascript widgets. Include a javascript script file with document.write('...') your widget code, and this gives you a way to be able to create widgets that you host the 'html' on your site, but is automagically included in the blog.

Cool...

Playing with Blogger

So I've messed with WordPress, casually posted on Tumblr, now it's time to play with blogger. Initial reactions are that it's really simple, we'll see if that continues.