I have just made available a workitem control that will allow you pick a Date from a calendar rather than having to enter in a date freeform into workitems. I went as far as to create an msi for easier deployment (not that it’s really hard) . I have also included a read me and a sample workitem that you can use as a reference. Please let me know what you think, I find it useful and hope you will to.
You can download it here WorkItem Date Picker