Guys if your in the UK and want some cracking discounts on a number of stores then check out:-
http://www.hotukdeals.com/main.html
oh and dont forget http://www.quidco.com/
Bought and currently readin Ajax in action - check it out of your planning on or currently using Microsoft's Ajax library and toolkit - the book is very thorough and you will learn how to use Ajax properly. Good examples and written buy the guys who know this stuff liek the back of their hands.
Make sure you check it out.
Cracking link for tutorials http://lvstechie.web1000.com/