How Can I install a Blog within a Blog WP?

I have a wordpress blog that is set up as a review site. I would like to actually start a blog within the blog for writing normal blogposts... I want readers to be able to access the new blog by clicking one of my page links from the review blog, and for it to follow the same css rules... how could i do this?

create a subdomain. install wordpress on it via fantastico, clone main site/use the same theme, have fun.

You could also put blog posts and articles in separate categories and build custom menus.