Ok, since there's obviously some confusion, lemme show you guys how they work. vBulletin now has a blog plug-in available and I thought some of you might be interested in it. Please check out all of the following links to help get a better understanding of how it would work (obviously, it would look like I-Mockery and wouldn't be the bright white design that they have):
Info about the features of vBulletin blog:
http://www.vbulletin.com/features_blog.php
Here's the blog homepage on a forum:
http://www.vbulletin.com/forum/blog.php
Here's a test user trying it out:
http://www.vbulletin.com/forum/blog.php?u=19405
Here's that same user with a bunch of comments in one of his blogs:
http://www.vbulletin.com/forum/blog.php?b=2
Hope this clears up some of the questions you guys have about it. And yes, there are some other sites out there that have implemented
both forums and user blogs such as Newgrounds and Destructoid.