Another excellent plugin to help with SEO for WP is
HeadSpace2. I use this and it's AWESOME.
This plugin lets you change how the browser and search engines display the name of your blog without fiddling with any code. You can also add descriptions for each posts, use Yahoo! to select proper tags for posts, select which pages of the blog you want to be 'nofollow', etc etc etc.
There's a lot you can do with it. I'm sure even I'm not maximizing its potential.