Took some time to work on the jQuery Horizontal Accordion Plugin. The new release works with the latest jQuery release and easing plugin.
The easing plugin is optional, so will even work without any additional plugins now :)
Still doing some final testing and will release it after Cebit, which is after the 9th. Also thinking about some additional options for it.
Next step will be the integration with jQuery UI and the usage of UI themes. I will add it as an option, so that you can decide if themeing is handled through jQuery UI. But more on that after the first Alpha release is out.