I could be wrong from visiting your vbNuke Powered Site qwaz, but its hard to get an opinion on it when its not there
vbPortal is a nice bit of work, I didnt pay for it at all, and quite honestly I don't want to get into the "wajones is crazy for charging" crap. It's been covered here and covered at phpportals.
I am curious if you are a contributing member over there? Or have you "somehow" gotten the software from another source? I can't see someone just shouting out that something is crap without trying it first.
Now fonzerelli_79, let me put my extra 2 cents in. vbPortal is a nice front page for a vbulletin site. Yes, you could sit down and hack every part of it together yourself, if you know PHP and MySQL, (which I am assuming you dont, sorry if Im wrong) and it would work *much* better than vbPortal does (or nuke for that matter) because you have *only* what is needed for your site and nothing more.
What vbPortal offers is a simple solution to that with a minimum amount of work. You can install nuke, but you will still have to hack it to intergrate it with vb. And if your going to go that far why not try Post-Nuke or PHP Website, both of which last time I checked 0wn3d Nuke in a big way.
What it comes down to is it all depends on you and the amount of effort you want to put into doing it.

Hope this helps