Very efficient CPU you have. I like the numbers. There are a variety of ways you can OC it. A simple way is to increase the CPU FSB clock by a small amount to ensure stability. Don't get carried away and go for a big jump. 5MHz is a nice increment. Then save the settings and reboot your PC. When you are increasing the speed of the frontside bus, it also increases the speed of your system RAM. Some other people have tried setting the RAM from 400DRR to 333DDR and then change the HTT frequency to 4 (800MHz). Your CPU can be clocked efficiently this way from 1800mhz to 2100mhz (230MHz FSB) easily.
This CPU has a high potential for OC if you know the different combinations to try, especially with RAM timings and such.