What I'm saying is that for an online portal, e-zine or whatever application, the Nuke family of product is far inferior from a performance, presentation and administration standpoint than other products. You may say "well I'm happy with what I have" until one day you realize that you've pulled the wool over your eyes because you thought that simplicity was best. When you look around and take just a little effort (I'm not even a developer), you can create sites that will look better, last longer, and be easier to handle than any of the Nukes, including Postnuke.
I'm not sure what "integration" means. With a true CMS, e.g. miraserver and others, you can administrate news pages easily, they can look wysiwyg, advanced multiple pagination, and also have all your articles published right into vBulletin 3 if you want. Care to create a thread for articles? That's already done for you. Want to have user posts appear on the front page? No problem. Even better, you can have a vBulletin thread dedicated to every "news article" or "story" that you publish rather than that string of nonsense called 'comments' that is held in Nuke. But I'm simplifying things. Yes, postnuke, php-nuke (still more support), and more nukes can be used but after seeing the light, I'd never go back.
Conclusion: For those of you starting out wanting to create your own portal, go to sitepoint, devarticles, or whatever popular web creation community and ask people what they are using. It will carry you much further than a nuke-based solution that continues to have enhancements layered on top of mediocrity... IMHO of course.