Sign in to your Google Pages, click on Site settings, then enable Experimental features.
You can try my test page for gadgets. It's simple add-on, I wish I could change CSS or even html/JS for it. Google pages just doesn't accept any JavaScript by User (Creator)
A Major milestone of the PHP framework CakePHP was just released, along with a new website. Cake is similar to Ruby on Rails in MVC patterning (Model View Controller), but is 100% PHP.
I been playing with it last two hours and I'm already loving it :)