According to my research an Intel Bloomfield CPU (more specific: a i7-920) should support Intel VT-x technology (http://ark.intel.com/products/37147/Intel-Core-i7-920-Processor-8M-Cache...) but under linux /proc/cpuinfo does not include the vmx flag as expected:
$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 26
My CPU is reported by Intel to support the AES-NI native instructions. http://ark.intel.com/products/65707
However, /proc/cpuinfo does not list the aes flag (which is what I guess is preventing me from installing the aesni-intel kernel module -- my ultimate goal is to have dm-crypt use the benefits of HW acceleration).