I found this site very informative. I started with the information literacy test. I didn't do too bad but I found the answers to the quiz more than I thought. I don't usually think about this information but as a technology specialist we have to share and teach the teachers and students how to find information on the information they are seeking.
Honestly I have never really cared what the address extensions or country codes for websites were. I think that in order to truly judge the validity of a website it would be important to discern whether it is a personal page, an university, or information by another country.
I also think that www.easywhois.com is really cool. I agree that when looking for information it is very important to note who is actually publishing the material. Along with the author of the site the site history is also important. November offers www.archive as a good way to research the changes a website goes under. The example they use martinlutherking.org is great. I try to teach my students to be careful while researching. I think I am going to use this in my AP Government class.
Finally, to gain a useful insight into the pages meaning you can run a external link search to see what pages have linked themselves to this page. This is important to see how other sites are using this information.