Cereal Experiments Largo - pun on Serial Experients Lain
cyb3rnode = cybernode
Smeg - yes, that's a real brand.
3vil = evil
B3owulf cluster = Beowulf cluster, a method of networking PCs for high performance parallel computing
t3h 3vil = the evil
CPUs = Central Processing Units
Ph34r my m4d mod'n s|<illz. = Fear my mad modding skills.
"Mod" is short for "modification".