WPF, awesome for demo ware

So after a few pretty cool demos with internal folks, we looked into developing a real WPF application for the business. Given the 2005 toolset we decided against it. For the few of that are really into the leading edge of things, we still felt it was clunky to develop. One thing it would definitely do is raise the expectations of the UI design around the organization. That being said, we are also looking at rolling out Dynamics CRM, SharePoint 2007 which at some level is incompatible with the WPF style of building applications. Both from a process, toolset, runtime and user experience.

We still have one application using WPF I hope to make available. Time will tell.

Can someone tell me why I need Blend there is no concept of version control in Blend?