I like them
vBulletin Setup - Blogs
I would look at it this way.. it's extra unique content no matter how you look at it. The real question is do you want to use a free version and have to worry about upgrades, or get the support mod by jelsoft that you know will work with all future version of vB.
I hope it gets better with the newer version of the vblog, it has a long way to go.