Hey, I don't have an 08, so I'm not much help, but I saw this and wanted to give you few lucky guys a heads-up. Looks like a 2" spacer lift is out now.
http://www.rockcrawler.com/features/newsshorts/08january/revtek_liberty.asp
http://www.rockcrawler.com/features/newsshorts/08january/revtek_liberty.asp