Likewise 5.3 supports Snow Leopard at 32 or 64 bit! Likewise Open 5.3 is open source software that can be used to bind Mac OS X, Linux & Unix to Active Directory. Likewise Enterprise (which is not open source) starts with the Open client but allows leveraging Workgroup Manager or Active Directory Users & Computers to manage policies. If you haven’t already, check it out at www.likewise.com.