AMD Shanghai is officially out

[Shintai]

Well but Deneb will be AM2+ + AM3, so if you have AM2+ mobo now, you can buy Deneb and then just change mobo for AM3.
And AM3 will be released much later.

I wouldnt count on it. There are 2 SKUs for Deneb. One AM2+ and one AM3. Hopefully there is another reason for it.