Changing root blog ?

Hay all, have the most upto date install, I have it setup so I can a number of blogs, at the time I ran a clan and we played a few gams so it seemed like a good idea at the time.

While all this was going on I was also running a blog for myself, I would like to take this blog and main it the main entry point for the site is there any easy way for me to do this.

having to goto sub.domain.com is getting annoying when i would rather I just went to http://www.domain.com