FreePress Blog
A plugin to pull your to do list from TaDa from 37 Signals, though a PHP configuration that’s not always standard on every server is needed for the plugin to work. Specifically, XSLT transformations in PHP.
So, if you have that functionality, and would like to produce your TaDa list on your site, you now have that option. The author hopes to release a version of this plugin that doesn’t rely on the XSLT transformation, however, no time table is available.