From : http://www.kriesi.at/archives/50-websites-that-make-amazing-use-of-javascript

Since the rise of Javascript frameworks like jQuery, Mootools and
Prototype, developers created stunning javascript solutions and effects
for their websites.

Below are 50 inspiring Websites that make good use of Javascript,
Websites which I have bookmarked over time for inspiration purpose.
Some of them are selected purely on look and feel, some have really
extraordinary Javascript functions implemented.

Origianl Source: http://www.webgyver.info/?p=86

If you’re developing AJAX features, or if your database driven web
site requires a few seconds to grab some information, you need some
kind of visual clue, letting your users know that they will have to
wait while something is happening. Right?

Cross site or not?

If you are Ajax programmer, and you want get some data from other site(with different domain), you will get such similar exception message in browser:
Error: uncaught exception: Permission denied to call method XMLHttpRequest.open

You may experience slow Web browser performance when you view a Web page that uses JScript in Internet Explorer 6 on a Windows Server 2003-based computer or on a Windows XP-based computer.  And Microsoft has released JScript Hotfix to improve Ajax Web Performence.
Yes, I like Ajax Web 2.0 but I can not tolerant the slowly loading speed if there are many JS GUI in the web page.  Microsoft explained the reason:

No JavaScript programming, only need copying and a little compiling with XML data, you can also create your own Google Map. Work with JavaScript Prototype Library,  GPlotter can let you create Google Map in sevral lines of code, without any javascript knowledge.

"GPlotter is a Javascript object which provides a simple interface to plot
markers onto Google Maps using a simple XML file. The interface allows the user