Nothing new here!
The M610x blade has two full-length, full height PCI-Express 2.0 x16 slots - which is a new thing for blade servers.
No it isnt TPM! HP have been doing PCI expansion blades for years. They sit next to a blade and are connected via the PCI buses and guess what you can plug 2 full height cards into them ........... just like the ones you've been talking about!
Fusion-io's ioDrive Duo flash disk to accelerate calculations or I/O for specific workloads.
Again HP have been doind this for years they are called IO Accelerators (OEM' versions of Fusion-IO), difference is HP managed to work out a way of fitting them on a standard mezz card format meaning a space saving, guess Dell couldnt be bothered to put the R&D effort in!