Rich Baker and I talk to Mike Mearls on the D&D Podcast (or direct download here) about the Forgotten Realms in 4th Edition. We're releasing the new campaign setting this August, though even now, the text is being tweaked by hard-working editors, and the art continues to arrive from dozens of artists commissioned for this tome. It's all coming together!
I've been working on the the Forgotten Realms Campaign Guide for 4th edition for what must be 3 years now. I'll be a proud papa (one of thousands of parents both in-house and out) on the day it is released.