I was asked about this by a community member over at Community Server so I thought I would post this to my blog for posterity.

If you want to just run a blogger only site using Community Server and host multiple blogs this is how I did it.

1) Make a backup of all web files just in case. 

2) Copied the contents of the blogs folder to the CS root (being careful not to over write the web.config file) in other words copy everything but the web.config file from the blogs folder to the root.

3) Changed these lines in the SiteUrls.config file:

<location name="weblogs" path="/blogs/" /> to this <location name="weblogs" path="/" />

Commented out this line for the home link by adding the <!-- -->

 <!--<link name="home" resourceUrl="home" resourceName="home" roles="Everyone" />-->

Then changed this line:

<link name="blog" resourceUrl="webloghome" resourceName="weblogs" roles="Everyone" applicationType = "Weblog" />

to this 

 <link name="blog" resourceUrl="webloghome" resourceName="home" roles="Everyone" applicationType = "Weblog" />

Changes in red, the first change was so that CS know where to add new blogs since the path has changed and the last to changes are to remove the default home button and to make the new home button work and point to blog application.

Also if desired turn off the other applications in CS in the Control Panel > Administration > Settings > Applications