From the blog post (with our emphasis):
New and exclusive apps continue to be launched in the Windows Phone Marketplace. Coming up, there is Zynga’s smash hit games Draw Something and Words with Friends, new apps from Bloomberg, WhatsApp, Groupon and a whole lot more.
After Angry Birds, Words with Friends is probably one of the few apps that can make or break the sale of a smartphone. No matter your individual thoughts on that, there is no doubting that it's a powerful brand name to bring to Windows Phone. It's likely to have a period of exclusivity for Nokia when it is first released, but this is a good software catch for Nokia and Windows Phone.
Hopefully it will be released before the launch of the Lumia 920 and Lumia 820 - bundling this app with the new handsets would really help on the sales floors across the world.