I got into this flash game called Grow Island. It's a puzzle game with great artwork. After the jump, I list the solution. Don't click it if you want to play the game.

Things to read and research:

Adobe Flex
qooxdoo
Silverlight
OpenMocha
Backbase
Google Web Toolkit
Authenteo
WebKit

More info - Ajaxian

Not a framework - Scriptaculous which uses Prototype. (That and JQuery are in another post.)