FontJazz now has support for basic latin characters, including ä, ö, ê, and so on.
Please consider submitting a link to your site, so I can showcase it here!
Note that the script itself won't do much on it's own - you need to generate a font to make any use of this script!
The stand-alone script is only provided for download here, so that you can update the script without needing to generate your fonts again.