Though we know Microsoft built Windows Phone 7 1.0 around consumers first, it sure has a lot to offer businesses as well. To get that message across, Microsoft just put out a "Small Business Mobility Kit" which consists of one PowerPoint file and one PDF documenting in detail how and why Windows Phone 7 will work for you. They even have a new website focusing just on this area: www.windowsphone.com/business.
The main thrust is of course Office, Shareppoint and the new Office 365 (cloud service). At the very least we know Microsoft hasn't forgotten about their bread and butter that is enterprise. We'll be watching to see adoption rates over the next six to twelve months to see if it pans out.