So this guy overclocked his DP 1 gHz mac to 1.2. But check out the other options on the mboard. i predict next rev at 1.0, 1.2, DP 1.33
http://homepage.mac.com/schrier/pmg4_1000_1200.html
http://homepage.mac.com/schrier/pmg4_1000_1200.html