I call BS and fake. That's just me though.
I feel it's a stupid idea though. Sony could, should, will, and is currently creating their own premium service that will out shine XBL. Also when Sony's Premium Service is implemented, ONLINE GAMING WILL STILL BE FREE ON SONY.

Everything that is currently offered FREE OF CHARGE on the PSN will NOT nor will it ever be charged on PSN. Especially when the Premium services are introduced. The Premium Services only add to the PSN, not change it.
So integrating XBL into PSN is a bad idea, and seems almost impossible as they have two totally different images. Home, those XBL avatars, the profiles, etc. All would be so hard to merge together.
So I don't see this happening.
That's just me. No I am not being a fanboy, that's just one mans opinion on the matter.