Over to the side you’ll see a list of themes I have installed for WordPress v1.5 and you can select the one that suits you best. I recommend sticking with Placid or Faded Blue because I’ve spent time customizing those.
Once I’m happy with the output I’ll make the theme selector plugin public.
Update: I’ve dumped the theme switcher I created for a more standard one I found at wp-plugins.org. It does everything mine did, and it seemed to have better error checking, cookie management, and no global variables either :D.