ajax VS FLASH's flex
Ajax http://www.cuhkacs.org/~alanlee/blog/archives/05/02/281054.php
http://jacky.seezone.net/archives/001188.html
http://www.backbase.com/index.php#0 看demo
http://www.getahead.ltd.uk/dwr/
http://www.indiankey.com/cfajax/
http://www.getahead.ltd.uk/dwr/config-js.html
http://cross-browser.com/toys/
flex
http://www.macromedia.com/devnet/flex/