Recently, I found more and more web sites using AJAX. However, I feel they are using a good technology in a wrong way. I guess it is probably related to Google success and every people feel the urgency to use some of the technology it promoted. Example...

I came across a simple document which outlining the basic principles on designing good software. I think it is pretty good. In case you want to check it out, you can find it in http://www.w3.org/DesignIssues/Principles.html