The idea is good but you need to use the current HN data or some sort of connection to our profiles. Having a separate website where you have to register won't really show the user data from here.
Take a look at the registration process. You need to place a link to your profile at hackernewsers in your HN-profile to be able to sign up. I like it :).
This looks a lot like http://hnhackers.com - I think having more than one of these might make both less useful.
The title of hnhackers is "Hire HN consultant", that seems very different to me.