I went to an Intel Keynote Speech once and they were talking about an 80 core processor.
Before you know it, quad core systems will be standard. Dual cure already is standard, buy any computer today and there's a very high chance it has a dual core processor.
The PS3 (no fanboys kthx) has an 8 core processor, however only 7 of these cores are used. The 8th is a backup incase one of these 7 failes.
Processors usually come in 1 physical processor, and more than one logical processor, or core.