I have been working on a slideshow plugin for FarCry that uses the jQuery cycle framework.
The project is hosted on google code: http://code.google.com/p/farcry-cycle/ and you can either download files as a zip or check out the project using SVN.
I saw this as a gap in the FarCry CMS, in which every site I have built using this CMS seems to have a requirement for. The big advantage of using jQuery over a technology such as flash is that it does not rely on external plugins, so will work reliably in more browsers.
The cycle plugin for jQuery, on which this is based, is excellent: http://malsup.com/jquery/cycle/