I just ran into a really great theme for WordPress called iTheme.
Here is what the creators have to say about it:
iTheme is a WordPress theme that is designed for the Mac lovers with a truly customizable sidebar. As an administrator, you can customize your sidebar’s contents without modifying the source code using WordPress widgets (no programming required). As an audience, you can rearrange the sidebar by drag & drop or you can collapse the box to save space.
It supports Widgets and has a drag and drop sidebar. It looks really good, and I am pretty impressed by it, so if you are an Apple fan, check out iTheme.