First "visual artifacts" here: returning original settings with transition control, after "restarting desktop", menu bar starting to display white lines...and beauty colorfull effects when closing transition. After restarting, all ok again. (950-500)
Well, living in Israel I think it would be risky for me to OC it above 800mhz haha. Especially since it's going to be summer pretty soon. I just had a realization: At 1GHZ the N900 is more powerful than the HD2. Since it has a GPU unlike the Qualcomm devices (HD2, Nexus One etc etc). It's pasically as powerful as an iPad at 1Ghz.