I received my pre-ordered Snow Leopard family pack today. I have an iMac and MP Pro (both recent models). On the iMAC I need Tivo Transfer (Roxio) to work. On the MBP I need the X-TEN VoIP utility so I can use my Vonage line when traveling (Vonage MAC utility never works). Both are reported to be non working on Snow Leopard - so I cannot upgrade either MAC. Hopefully the developers will fix this quickly.