The hardware comes with an interesting configuration (AMD Quad-Core, 16 DIMM slots, integrated quad-ports NIC with TOE, up to 292GB local storage, etc.) and the option to pre-install a couple of hypervisors: VMware ESXi and Citrix XenServer Embedded Express (renamed XenServer Dell Express Edition).
Both are loaded at boot from an integrated SecureDigital card slot but could also load from an internal USB port:
In the coming weeks Dell will offer the two products also with other PowerEdge series like the new R900 (Intel-based), the dear old 2950 and the M600 blabe systems.
Update: Dell already published the VMmark benchmarks for the new R905, which achieved the best performance among others 16 cores (4 sockets) systems from IBM, HP and Sun. Even better than the Intel-based Dell R900.