From the picture
I can see two heatsinks. Does this mean that a pair of processors share a heatsink, or does "four processors" mean two dual core sockets? I'm a Sun man, and Sun use the term "dual core processor" to mean two cores in one socket.
Perhaps the terms "socket", "core" and "thread" are suitably unambiguous. I'd be interested to discover how these blades will carve up into LPARs: with SPARC LDOMs, we can assign down to the thread level into an LDOM, then carve out processor sets in each Solaris instance ...
Q: "How many processors does my server have?"
A1: "Well, that depends on what you mean by processors, and what you mean by server".
A2: "You're paying for capacity, not processors or a server".
Are IBM expecting these blades to be used as a single instance, or to be carved up into virtualised server capacity?