Another excellent Usability Resource is: http://www.useit.com/alertbox/
Another really good resource is the following non-copyrighted book. They provide you solid information backed up with the research.
One of the best resource of usability is www.measuringusability.com
Post deleted by Peter Ruscoe
Never test the depth of the water with both feet.
ASH, apparently you do not work for **********, but the link you gave is just advertising for that company's services.
Can you explain, please? (Otherwise the link will be removed).
Peter Ruscoe accept my apology i must have pasted it accidentally but i wanted to post following links on usability testing
I found above links very useful during my work and Master degree.
You can also check the "ACM's Special Interest Group on Computer-Human Interaction" web site: http://sigchi.org/
one another very detailed and informative site..