Great question.
One that the first readers of beernews.wordpress.com probably asked themselves. But hey, a blog with thousands of readers started with ONE VISITOR. Just like a board with hundreds (or thousands?!) starts with ONE VISITOR.
Here is why I started the board (aside from the obvious community building aspect):
1) Will create a reference point in which one can easily see multiple updates for any given beer about which I've written.
2) Provides an informal medium in which I can spread more info (I don't have time to write polished stories about every beer so some will just be posted on the board).
3) Combines useful information with new (yet basic) technology. See this thread about tagging/subscribing (RSS!) to topics so that you can get custom beer updates even when you are not on the site.
4) For those at other sites that encounter warnings when discussing my site! You know have a safe home to discuss my updates right here.