Apple yesterday released a supplemental update for OS X 10.6.8 that fixes a few issues for those wanting to migrate to Lion.
The Mac OS X 10.6.8 Supplemental Update is recommended for all users running Mac OS X Snow Leopard 10.6.8 and resolves issues with:
• Transferring personal data, settings, and compatible applications from a Mac running Mac OS X Snow Leopard to a new Mac running Mac OS X Lion
• Certain network printers that pause print jobs immediately and fail to complete
• System audio that stops working when using HDMI or optical audio out
For detailed information on this update, please visit this website: http://support.apple.com/kb/HT4561.