my name is peter wong who came from Malaysia. I have a idea where you can improve the amount of user login to go4expert. You can add a collection points system when existence member has successfully recommended this webite to his friends and the existing member can collect one point. When the existing member has achieved certain amount of points, the existing member can reddem some gits where published at the website.
Example of gifts: Linux OS DVD, T-shirt and many others more.
I hope that this idea can appreciated by you.