Once an author receives notification of a contract, there is usually a long period before they hear from an editor. I'm sure within the next three weeks I'll hear, but I'm not waiting. I've gone ahead and started proofing my manuscript yet again. It's always amazing to find the things I've overlooked.
On the other hand, promotion goes ahead. I've heard from the Wings representative about participating in author interviews so plan to get that taken care of ahead of time. Also have to make sure all my obligations for blog posts are scheduled ahead so I can concentrate on my manuscript when it comes.