I don't know if this makes it any easier for most people from my perspective.
Blog = Website
Website = Blog
I would argue that most sites today, if based on technical abilities of a platform, could be considered a blog.
If you are talking about the article based information layout, with dated posts being sorted and moved around like a newspaper.... it is an increasing trend. I even know several web platform developers that have recently retooled the basic "web package" to include or center around a blog.
I think the biggest pro for me is ease of use and adaptive ability. I like to dig around in the newer tech tools and play in the mud. My second PRO is that I love being social online and developing my business through information.
The biggest disadvantage is lack of clarity and too many choices. I spend roughly half my workload looking at services and testing tools that do not work as required/shown. If it creates annoyance in someone with my technical aptitude, I can only imagine most people want to smash the keyboard to bits.
I think Dan would be a good person to chime in here. Biznik is a "super blog" for multiple users and groups. Perhaps he can tell us how many people on Biznik have business blogs on their profiles? (that would be an interesting statistic to know with the Biznik community)