I am planning on building a moderate size supercomputer in the next 6-8 months. I have about $300,000 to spend on hardware, software, and ancillary components (racks, switches, cables). I already have the necessary electrical and HVAC set ups and plenty of labor. I have my eye on two racks of 32 xServe G5s and two 14TB xRAIDs. What are the chances that Apple will upgrade the xServe G5s to have quad-cores? Does anyone have an estimate for what the LINPACK score would be with current xServe configuration vs the potential quad-core xServes?