I've just found out that Google has released a custom 404 widget. The idea is to improve the experience of 404 pages and instead of telling the user that he or she is lost, provide him with something he could really use.
There are many situations while developing websites when you need to know how long a text string is: not how many characters it has but how long it is in pixels.
The IE team has recently announced that they have made a few AJAX improvements in the newest version of Internet Explorer. One of such improvements is support for updating the navigation log through AJAX. So when your application uses intensively AJAX to enhance the User Experience, you can still leverage the native browser navigation mechanism by updating the navigation log information.
Recently I have spent quite some time measuring and tuning the performance of the Imtech SharePoint Enhancement Toolkit: a toolkit that I have built in order to achieve standards compliancy, accessibility and slightly more performance of SharePoint Web Content Management (WCM) solutions.