AJaX for weblogs
The Asynchronous JavaScript + XML (AJaX) solution is one that can bring happiness and bliss to web designers and web developers alike. However, as with many whiz-bang solutions caution is advised. Google uses it to great effect and personally I think they take it a bit too far. If a page changes in a way that its context changes then it should move to a new URI. People often bookmark content within a specific context. As soon as this is no longer true it maybe a clue that you’ve gone to far.