Golden future for AJAX / Web 2.0

AJAX - or Asynchronous JavaScript and XML has quite a future.

Just a few years ago, any changes on the page would result in the whole page being reloaded again. Now, more and more sites are using AJAX -making it possible for application like behaviour from within your browser.

Here are some useful AJAX powered sites:

Mail
Gmail - (Google Mail in the UK)

Maps
Google Maps
Microsoft's Virtual Earth

Calendar/Tasks/Contacts/Social Organizer
Airset
CalendarHub (updated!)
Kiko

Word Processor
Writely (tip!)

Spreadsheet
Numsum

Portals
Google's Personlized Page
Netvibes
Microsoft Live

Many, many more... see here via Google's cache. Deleted from Wikipedia.