I've updated the 2008 Mac Pro Owner Feedback page with a new owner's comments (all OK, huge upgrade from his Beige G3) and a follow-up from a reader that's still seeing occasional system freezes (unlike some others, disabling sleep in Energy Saver did not help him, nor did other suggestions like a clean reinstall, etc. - I suggested he call apple to report this as well as ask for a replacement 2600XT card perhaps.)