Yeah, of course. AMD is touting that as a major selling point for a year or so.

What is not certain whether AM3 chips will work in AM2.

In essence, this is the situation as of now:

AM2 chips work in AM2, should in AM2+ and _may_ work in AM3 sockets
AM2+ chips will work in AM2, AM2+ and should in AM3 sockets
AM3 chips _may_ work AM2, will work in AM2+, AM3

Beyound AM3, no one knows.

For starters:
AM2 - current product
AM2+ - HT3(optional on MB), chips will support DDR2-1066, optional split power planes
AM3 - HT3(optional on MB), DDR3, required split power planes

HT3 is backwards compatible with HT2 on AM2 so the only real difference of AM2+ is about to be power-related, as for AM3 power + DDR3.

FIY there have been at least 5 incompatible "revisions" of Intel's LGA775 socket. 2 in 2004, 1 in 2005, 2 in 2006 ...

I know you are but what am I?

Isn't it obvious ?

You are Mr. Comfit.

Maybe if you read the comments before postig you would know that AM2+ will be AM2 compatible both ways.

Xbit a bit screwed up on this news story...

It's BULLSHIT that is won't be compatible. And are idiots who are taking this as fact, just because it's written here.