Re: cpu/motherboard compatibility
You can use a regular AM2 board for an AM3. But not all of them will, it is mainly up to the motherboard vendor. So no, it does not have to be AM2+ as long as the proper bios is supported for AM3.
Random movie quote to make you seem hip and "with it":
"Please take the chairs away. I don't like them. The big one is staring at me and that short one is being very droll."