I have a new theme in production that I am going to release under GPL in a couple of days. It is basically done but for a couple of tweaks and I'm also packaging it with a matching skin for a Simple:Press isntall. It will be available for download soon, but if anyone wants to beta test it let me know!
It's simple, two column, fixed width, widget ready.
Checked on BroswerShots.org for all the majors - Firefox, IE, Safari, Opera.