Beta 2 introduced some useful new features, but became less stable because of it. Beta 3 is here to fix the stability issues, and add new features. Fauna is now nearly feature complete.
A great theme, that is itching for me to upgrade my personal blog to WP 2.0 and use on, with many many built in features and options. Definitely a great example of what some of the new features in WordPress can produce.
I’d like to point out that this theme is compatible also with WordPress 1.5.
My apologies. I assumed with the theme options, you were simply a 2.0 based theme. I’m guessing Ozh’s work is what makes it 1.5 compatible.