I can't vouch for the Extra Large or Double Extra Large ones, but the Quadruple Extra Large ones use Nehalem-based Gainestown Intel Xeon X5550 @ 2.67GHz.
processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 26 model name : Intel(R) Xeon(R) CPU X5550 @ 2.67GHz stepping : 5 cpu MHz : 2666.760 cache size : 8192 KB physical id : 0 siblings : 1core id : 0 cpu cores : 1 fpu : yes fpu_exception : yes cpuid level : 11 wp : yes flags : fpu tsc msr pae mce cx8 apic mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm constant_tsc pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr dca popcnt lahf_lm bogomips : 5337.91 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management:The Authoritative List of Packages Needed to Comile the WikiReader Firmware
This is for a 32-bit Ubuntu Karmic schroot (as outlined in doc/Using-schroot.text) on a 64-bit Debian stable installation.
flex bison ocaml python python-gd gforth guile-1.8 gawk php5-cli php5-sqlite sqlite3 xfonts-utils cjk-latex dvipng qt4-qmake libqt4-dev sudo wget