Nice to see your answer.
Quote Originally Posted by si_the_geek View Post
You cannot PM yet, you need a certain amount of valid posts in the technical forums before they become available to you. It is unfortunate at times like this (as I would have been able to send you a PM to explain why your posts were gone), but there are valid reasons for that restriction.
Oh, I see. Isn't it possible just to restricts PMs sending, not receiving in vBulletin?

Quote Originally Posted by si_the_geek View Post
If you want to advertise to our members, you will need to do it officially by paying for it - as is done by the companies shown at the top-right (and bottom) of our pages.
Is there any other legal way to talk about our solution with ppl at VBForums.com, in order to know their opinion and suggestions? - Most of forums discussions are about commercial products,

In fact, it can save few days of work for someone, and give much GUI ideas.
And its shareware, so anyone can use it as long as he likes.