I really would like to suggest Aperture, a very comprehensive and aesthetically, and logistically attractive theme by WooThemes. I have visited a website using this theme before, and I find that not only is it a handsome looking build but would fit my blog quite nicely. Probably my most favorite theme for WordPress so far. I hope you consider adding it to WordPress.com!
The blog I need help with is jjcquinn.wordpress.com.