jjfarren-

Surely they also look at your browsing history, when you use Chrome, or even when you use their search engine.

i think he/she meant javascript not CSS.

Apart the visited link way there are also other means of achieving the same result even working server side. Check out this paper http://wozad.com/docs/sp3.pdf ,it's covering also the privacy issues.

We had considered the same issue, but decided to give it a try anyway.

Yes you are right,i should not have linked the post to the main page, this might look a bit rude.Anyway i do think that this application has some kind of value to share. And as i already commented the feedback of this community is very important for us. Finally our methodology is much more extended from the "random hack" you talk about, that random hack is something coded in one evening just to give a proof-of-concept.

i do think that you do not know the word Spam, a duplicate post isn't spam. I've explained why i duplicated and i won't be posting more. My purpose was to get feedback from the community. You might believe that i'm stupid enough to think that i can my business fly by advertising here, well, this is not exactely true. Anyway thanks for your comment.

well, everybody here misunderstood the meaning of this post. It wasn't get instant userbase, but instead get the feedback of hacker news community. This is partly achieved and i say thanks to everybody who partecipated in this discussion.

If you read carefully on our website you will learn about the limitations of cookie based methods.

Well, the first post title wasn't clear, it has been ignored. I decided to post again because i do think that the matter is at least "interesting".

I think you did not understand that much..

Thanks for your feedback George, the email problem is fixed. We did put a lot of efforts in this startup and our resources are very limited, both in financial and human resources terms. Perfection at the moment it's well beyond us. We mentioned the big Google with the intention to create some buzz and focus on the similarities between the two systems. Similarities that anybody can observe. Anyway your point of view makes perfect sense and your feedback has extreme value for us, again sincere Thanks.

I can sign up succesfully, it seems it's fixed.