This product has been retired. The new product taking up this functionality is called Sun Java Identity Manager (aka Waveset Lighthouse). This product offers much more functionality than the plain synchronization functionality. Please see http://www.sun.com/software/products/identity_mgr/index.xml
The architecture of the 2 products are fairly different. So having an automatic migration tool is not possible. However, there is an internal document/kit (with working examples) of typical migrations. Please contant you Sun sales rep for details.