Apparently this is the Day of the System Upgrades; yesterday must have ended a fiscal quarter for the vendors.
SC Online reported yesterday the UNC Chapel Hill is upgrading their Dell cluster:
The upgrade will replace each of Topsail’s 520 processing blades, currently configured with two processors per blade. Each new blade will have eight processors, based on two quad core “Clovertown” Intel chips, which are expected to nearly quadruple performance capability. Each new blade will also have 12 gigabytes (GB) of memory, compared with the current four GB of memory per blade, simplifying analysis of rapidly growing scientific data.