I am pretty impressed by a link that my business partner Greg sent me this morning to a website called Quarkbase.
Quarkbase is a free tool that allows you to find out complete information about a website. It is a mashup of over 30 data sources and many algorithms gathering information from Internet on various topics like social popularity, traffic, associated people, etc. I tagged it in my delicious bookmarks this morning because I am pretty sure this will come in handy sometime. One thing that I really like about Quarkbase is that it gives a pretty comprehensive social drilldown for each site as well, this is good information when it comes to evaluating where a potential client stands in terms of their online business.
Quarkbase : Everything about a Website
My personal favourite traffic estimation website is http://www.estimix.com . It seems to use the Alexa traffic information quite well and generates very accurate traffic information
Thanks, will have to check that out.