I have a new theme, it's a 2 column theme with electric guitar graphics. It would suit a blogger who writes about guitars, or just about rock music generally.
You can see screenshots and a more thorough description here: http://www.wordpressguitarthemes.com/rock-guitar-theme-for-wordpress/
You can preview it here: http://rockguitar.wordpressguitarthemes.com/
And you can download it here: http://www.wordpressguitarthemes.com/wp-content/uploads/2010/01/guitar.zip
It's released under the GPL v3, so you can do what you want with it so long as it stays free, full licence details available at gnu.org